The first T-Mobile G1 Android phones will ship this week. Our review partner Digital Trends got their G1 already in the test lab and they published a review.
Quote from the review: "Apple's iPhone finally has a worthy rival. The T-Mobile G1, due to go on sale Oct. 22, is the first phone to run on Google's fun, flexible and functional open source Android mobile operating system. Although the G1 is not as sleek or as well integrated as the iPhone - after all, its hardware and software come from two different places - it actually out-performs the iPhone in several ways. But the G1 is held back by T-Mobile's less than ubiquitous 3G HSDPA network and no iTunes-like universal syncing software, both solvable problems. In spite of these current deficiencies, the G1 is arguably the most facile portable device ever devised. At least, that is, until the next Android phone with upgraded software arrives."
Read the full T-Mobile G1 Review.