Today I declared myself officially on the Google Wave bandwagon when I released a tiny Wave client called ripple. I wrote it to see if it would be possible to make Wave work in only HTML, something we may soon want for work if we're to provide an accessible alternative interface to Wave for our users.
From what I'm hearing from the Wave crew, this is also the first example of doing something significant with Wave in Perl. That's exciting.
There's more detail on the splash page, but here's some quicky links to get you started: