Scott Wilso at Uni of Bolton has created some Google Wave widget for Moodle.
"I've created a Moodle course that uses some widgets, all of which make use of the Wave Gadget API. Some of these are Google examples (converted to W3C format) and some are ones we've created."
"...I've been musing on how I integrated social media [twitter, wikis, zotero, google wave & docs] into my classes" via Stephen Downes who noted "you can't just take these new technologies and cram them into an old-word [sic] course"