There's now living proof that Wal-Mart will be offering the T-Mobile G1. Android Community member alpinestar snapped a couple of shots of printed material along with a dummy unit of the G1 at a local Wal-Mart. We'd speculated that Wal-Mart would start selling the G1 today, but it looks like we might be a couple of days off.
According to the picture, there's still no price info yet. Earlier when I emailed T-Mobile inquiring about the G1 being sold at Wal-Mart, I was told that it's still a rumor and T-Mobile isn't commenting.
If the rumors are to be correct, Wal-Mart will sell the G1 for $148.88, which is over $30 cheaper. I have to wonder how existing owners of the G1 will feel about all this. I guess that's a price they pay for being early adopters.