+Many SIPB members and prospectives [use zephyr](http://sipb-www.scripts.mit.edu/doc/wiki/UsingZephyr) to communicate about
+projects, discuss what's new (or old) in the computing world, and
+generally keep in touch. Here's a list of some zephyr classes you
+might be interested in subscribing to.
+
+*Note*: If you're new to zephyr or to any of these classes, you're
+encouraged to just listen to the class at first and get a feel for the
+class's typical modes of behavior. If you jump right in, you might
+risk accidentally offending someone.
+
+* **<sipb,\*,\*>** - The general class for SIPB members and prospectives. General discussion.
+
+* **<sipb-door,\*,\*gt;** - Receives a zephyr whenever SIPB's office door opens or closes. Great way to keep track of whether the office is open or not.
+
+* **<sipb-auto,\*,\*>** - Receives a variety of automatically generated zephyrs, including...
+ * **lt;sipb-auto,sipbmp3,\*>**
+ * **lt;sipb-auto,sipb-door,\*>** - See **<sipb-door,\*,\*gt;** above
+ * **lt;sipb-auto,sipb-www,\*>**
+ * **lt;sipb-auto,backups,\*>**
+ * **lt;sipb-auto,nagios.stuff.HTTP,\*>**
+
+