I got an invite and 20 to send out but I'm afraid they've all gone out.
As Fabe says you can request one direct from Google or there are other members who may have some to send.
Barman58 has started a SevenForums Wave and there are a handful of us on
that and hopefully it will grow as more people get on board.
PParks is right. It's a very awkward interface at the moment and far from intuitive. The settings page is still under construction and none of us seem to know what we're doing. I got lots of "are you there?" messages.
Hopefully Google will be updating it swiftly.
I hope you find an invite, John
ps,. pp you might want to check your inbox under "all" and hopefully you'll see Nigel Barman's wave