I suppose I should advodiarize what I've already announced to lispweb and the #lisp Yabos: Araneida (at least Araneida CVS) is now "Portable Araneida", meaning it runs on SBCL, OpenMCL, and Allegro, and a very particular version of ABCL. Araneida is a very nice web server that powers CLiki and lisppaste, and it's significantly easier to understand in my experience than portable allegroserve. It also doesn't depend on a compatibility library for most of the API of another lisp, making it somewhat easier to port.
I'm planning on releasing the latest version of chavatar web-based IRC client later tonight, when I'm in front of my PGP key. But, for now, there's a demo instance up and running - use username and password "demotar". It can't /join or /part channels, or change its password, due to being in demo mode, but it's enough to get a feel for it. It's running in #demotar on irc.freenode.net, if you want to see it talk.