Wavenub is a project mainly written in RUBY and JAVASCRIPT, it's free.
Expose public Google Waves to the Internet (perhaps you've heard of it)
It doesn't look as if Google is exposing public waves outside Wave. Public waves should be exposed on a public website and indexed by Google. That's the purpose of wavenub.
This project runs at http://wavenub.com
Contact Bill Burcham on Google Wave [email protected] or email at [email protected]