diff --git a/index.html b/index.html
index 8428b300f..0d917d083 100644
--- a/index.html
+++ b/index.html
@@ -17,6 +17,7 @@
         <script type='text/javascript' src='js/lib/sha.js'></script>
         <script type='text/javascript' src='js/lib/ohauth.js'></script>
         <script type='text/javascript' src='js/lib/jxon.js'></script>
+        <script type='text/javascript' src='js/lib/d3.typeahead.js'></script>
         <script type='text/javascript' src='js/lib/d3.geo.tile.js'></script>
         <script type='text/javascript' src='js/lib/d3.size.js'></script>
 
diff --git a/js/id/connection.js b/js/id/connection.js
index baf767c6a..7e81fd779 100644
--- a/js/id/connection.js
+++ b/js/id/connection.js
@@ -131,16 +131,16 @@ iD.Connection = function() {
         });
     }
 
-    connection.url = function(x) {
+    connection.url = function(_) {
         if (!arguments.length) return apiURL;
-        apiURL = x;
-        oauth.api(x);
+        apiURL = _;
+        oauth.api(_);
         return connection;
     };
 
-    connection.user = function(x) {
+    connection.user = function(_) {
         if (!arguments.length) return user;
-        user = x;
+        user = _;
         return connection;
     };
 
diff --git a/js/id/taginfo.js b/js/id/taginfo.js
index d6524c9ca..680dbe37a 100644
--- a/js/id/taginfo.js
+++ b/js/id/taginfo.js
@@ -1,20 +1,10 @@
-// Taginfo
-iD.taginfo = (function() {
-
+iD.taginfo = function() {
     var taginfo = {},
         endpoint = 'http://taginfo.openstreetmap.org/api/2/';
 
-    function qsString(obj) {
-        return Object.keys(obj).sort().map(function(key) {
-            return encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]);
-        }).join('&');
-    }
-
-    // Given a key, return common values
-    // TODO: get type, count correctly based on it
     taginfo.values = function(key, callback) {
-        d3.json(endpoint + 'db/keys/values' +
-            qsString({
+        d3.json(endpoint + 'db/keys/values?' +
+            iD.Util.qsString({
                 key: key,
                 sortname: 'count_all',
                 sortorder: 'desc',
@@ -22,5 +12,11 @@ iD.taginfo = (function() {
             }), callback);
     };
 
+    taginfo.endpoint = function(_) {
+        if (!arguments.length) return endpoint;
+        endpoint = _;
+        return taginfo;
+    };
+
     return taginfo;
-})();
+};
diff --git a/js/id/ui/inspector.js b/js/id/ui/inspector.js
index 4f54f020e..7e9ea12bb 100644
--- a/js/id/ui/inspector.js
+++ b/js/id/ui/inspector.js
@@ -1,5 +1,6 @@
 iD.Inspector = function() {
-    var event = d3.dispatch('changeTags', 'changeWayDirection', 'update', 'remove', 'close');
+    var event = d3.dispatch('changeTags', 'changeWayDirection', 'update', 'remove', 'close'),
+        taginfo = iD.taginfo();
 
     function drawhead(selection) {
         selection.html('');
@@ -72,6 +73,15 @@ iD.Inspector = function() {
                     .on('keyup', function(d, i) {
                         d[i ? 'value' : 'key'] = this.value;
                         update();
+                    })
+                    .each(function(d, i) {
+                        var selection = this;
+                        if (i == 1) {
+                            taginfo.values(d.key, function(vals) {
+                                d3.select(selection).call(d3.typeahead()
+                                    .data(vals));
+                            });
+                        }
                     });
 
                 row.append('td').attr('class', 'tag-help').append('a')
diff --git a/js/id/util.js b/js/id/util.js
index 69af16e26..b0ded6130 100644
--- a/js/id/util.js
+++ b/js/id/util.js
@@ -49,3 +49,9 @@ iD.Util.tagText = function(entity) {
         return e.key + ': ' + e.value;
     }).join('\n');
 };
+
+iD.Util.qsString = function(obj) {
+    return Object.keys(obj).sort().map(function(key) {
+        return encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]);
+    }).join('&');
+};
diff --git a/js/lib/d3.typeahead.js b/js/lib/d3.typeahead.js
new file mode 100644
index 000000000..08703c86c
--- /dev/null
+++ b/js/lib/d3.typeahead.js
@@ -0,0 +1,48 @@
+d3.typeahead = function() {
+
+    var data = [], limit = 10;
+
+    var typeahead = function(selection) {
+        var option_div = d3.select(document.body).append('div')
+            .attr({
+                'class': 'typeahead',
+                position: 'absolute',
+                left: selection.node().offsetLeft,
+                top: selection.node().offsetTop
+            });
+
+        selection
+            .on('keyup', function() {
+                var val = d3.select(d3.event.target).property('value');
+                var matches = data.filter(function(d) {
+                    return d.toLowerCase().indexOf(val) === 0;
+                });
+                if (matches.length === 1 && matches[0] === val) {
+                    matches = [];
+                }
+                var options = option_div.selectAll('a').data(matches);
+                options.enter()
+                    .append('a')
+                    .text(String)
+                    .on('click', function(d) {
+                        selection.property('value', d);
+                    });
+                options.exit().remove();
+            });
+    };
+
+    typeahead.limit = function(_) {
+        if (!arguments.length) return limit;
+        limit = _;
+        return typeahead;
+    };
+
+    typeahead.data = function(_) {
+        if (!arguments.length) return data;
+        data = _;
+        return typeahead;
+    };
+
+    return typeahead;
+
+};