Rendezvous for Windows
Apple has released a Rendezvous implementation for Windows that includes an IE plugin and printer setup utility. Interesting, but I can't seem get it to work properly. I will assume that is because it's a "technology preview." Even though the same technology seems to work in iTunes for Windows. Go figure.
At any rate, there's some serious potential here. Rendezvous is some seriously cool stuff for things like LAN communications among co-workers (i.e. iChat Rendezvous) and locating printers on a network. Let's hope they keep improving it to the point that it does something useful - other than with iTunes, which we all know is very useful ;-)
There's also another implementation of Rendezvous for Windows called Howl that's been around for a while. But, little seeems to have ever come out of it. Interestingly enough, the IE plugin for Howl "looks" identical to the Apple version. There's not a printer setup utility included with Howl though.