I'd offer mine, but it seems you all have plenty to go around.
It's interesting, the speed that these invites are going out. I mean, for starters, everyone gets 6 invites (after a while). That means if everyone used them, the number of users is going up exponentially by a power of 6. Since people don't, lets say it is just a by a power of 2 or 3. It seems like Gmail will hardly need to go "public" since most anyone that would want an account will already have one by the time the beta is over.