Google Voice, anyone use? Have any invites?

[Finnster]

Anyone have this app for the phone? How well does it work? I'm looking at it mostly to do free SMS. I really don't want to pay any more money for the phone, esp considering I'm already paying for an unlimited data plan and SMSs are a minicule amt of data, and just really a cash cow for the cell cos.

Google Voice seems like it does some other really cool stuff.
LMK, and if anyone has an invite they could give, please can I have one? :)

Thanks