diff --git a/README.md b/README.md
index 1e170a5c..f80e731c 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,6 @@ Background pattern from http://subtlepatterns.com/, commercial and non-commercia
 
 * Cannot send images or other media.
 * Cannot delete messages.
-* No typing indicators.
 * No indication of chat status (muted, blocked, etc.).
 * Browser push notifications are missing.
 * No encryption.
diff --git a/css/base.css b/css/base.css
index 6977804e..75bfc322 100644
--- a/css/base.css
+++ b/css/base.css
@@ -628,6 +628,24 @@ table.permission-editor td.checkbox {
   background-color: #C0C0C0;
 }
 
+/* Typing indicator: animation of the online dot */
+.online.typing {
+  animation: typing 1.5s infinite;
+}
+
+@keyframes typing {
+  0%    { background-color: #40C040; }
+  25%   { background-image: radial-gradient(#30D030 0%, #40C040 67%); }
+  33.3% { background-image: radial-gradient(#10EE10 0%, #40C040 50%); }
+  41.7% { background-image: radial-gradient(#00FF00 0%, #40C040 35%); }
+  50%   { background-image: radial-gradient(#30D030 0%, #40C040 67%); }
+  58.3% { background-image: radial-gradient(#10EE10 0%, #40C040 50%); }
+  66.7% { background-image: radial-gradient(#00FF00 0%, #40C040 35%); }
+  75%   { background-image: radial-gradient(#30D030 0%, #40C040 67%); }
+  83.3% { background-image: radial-gradient(#10EE10 0%, #40C040 50%); }
+  91.6% { background-image: radial-gradient(#00FF00 0%, #40C040 35%); }
+}
+
 .contact-box .checkmark.material-icons {
   display: inline-block;
   width: 1.5rem;
@@ -1474,11 +1492,6 @@ ul.tabbar li.active > a:after {
   animation: spin 1.5s linear infinite;
 }
 
-@-webkit-keyframes spin {
-  0% { -webkit-transform: rotate(0deg); }
-  100% { -webkit-transform: rotate(360deg); }
-}
-
 @keyframes spin {
   0% { transform: rotate(0deg); }
   100% { transform: rotate(360deg); }
diff --git a/index.html b/index.html
index 0aa3ddb3..949f86ee 100644
--- a/index.html
+++ b/index.html
@@ -36,7 +36,7 @@
     var API_KEY = "AQEAAAABAAD_rAp4DJh05a1HAwFT3A6K";
 
     // Minimum time between two keypress notifications, milliseconds.
-    var KEYPRESS_DELAY = 5*1000;
+    var KEYPRESS_DELAY = 3*1000;
 
     // Delay before sending a {note} for reciving a message, milliseconds.
     var RECEIVED_DELAY = 500;
@@ -2352,7 +2352,8 @@
           topic: '',
           title: '',
           avatar: null,
-          scrollPosition: 0
+          scrollPosition: 0,
+          typingIndicator: false
         };
       },
 
@@ -2500,9 +2501,17 @@
       },
       handleInfoReceipt: function(info) {
         switch (info.what) {
-          case "kp":
-            console.log("show typing notification");
+          case "kp": {
+            clearTimeout(this.keyPressTimer);
+            var instance = this;
+            this.keyPressTimer = setTimeout(function() {
+              instance.setState({typingIndicator: false});
+            }, KEYPRESS_DELAY + 1000);
+            if (!this.state.typingIndicator) {
+              this.setState({typingIndicator: true});
+            }
             break;
+          }
           case "read":
           case "recv":
             // Redraw due to changed recv/read status.
@@ -2583,11 +2592,12 @@
             if (cont.online) {
               lastSeen = "online now";
             } else if (cont.seen) {
-              lastSeen = "Last seen: " + shortDateFormat(cont.seen.when);
+              lastSeen = "Last active: " + shortDateFormat(cont.seen.when);
               // TODO(gene): also handle user agent in c.seen.ua
             }
           }
           var avatar = this.state.avatar || true;
+          var online = cont && cont.online ? "online" + (this.state.typingIndicator ? " typing" : "") : "offline";
           component = (
             <div id="topic-view" className={this.props.hideSelf ? 'nodisplay' : null}>
               <div id="topic-caption-panel" className="caption-panel">
@@ -2600,7 +2610,7 @@
                 <div className="avatar-box">
                   <LetterTile avatar={avatar}
                     topic={this.state.topic} title={this.state.title} />
-                  <span className="online" />
+                  <span className={online} />
                 </div>
                 <div id="topic-title-group">
                   <div id="topic-title" className="panel-title">{this.state.title}</div>