Brian Mastenbrook's IRC bot lisppaste has become quite useful on #lisp. Yesterday he announced version 2.1.1:

Lisppaste started out as a simple little hack using Araneida and the guts of weird-irc, but it has grown considerably: it has spawned a new library (cl-irc, based on weird-irc), added paste persistence, paste annotation, multiple channel support, and now RSS support and direct linking to the meme.b9.com IRC logs.

It's a fairly good example of a non-trivial web and network application in Common Lisp, so if you're interested in such things take a look at http://www.common-lisp.net/project/lisppaste. To see what the pastebot has acquired so far, check out http://www.common-lisp.net/paste/list, and to syndicate it in RSS try http://www.common-lisp.net/paste/list.rss.