Halo 3 Public Beta is available today!!!! You did have to sign up for the beta or purchased Crackdown to participate.
There are some new weapons and grenades available so have some fun with them. I am not the best player myself, but have always enjoyed Halo and Halo2 so I do indeed enjoy Halo3 as well!
For those of you who are curious as to when Halo 3 will release, I heard rumors that the date is September 25, 2007!!!! Of course, we (Microsoft) have not actually officially committed to that particular date, but we are committed to Fall timeframe. I would love to see it come out by September 25th though!! Woo Hoo!!!!
PS: I updated this Blog Post due to some inaccuracies and mispellings.