T-Mobile has not yet released their official exact release date or pricing, but Engadget believes it is a safe bet to expect the $199 price point in some form or another. The T-Mobile site here says that current T-Mobile customers will have exclusive access this month to pre-order the G2, and a rumored leaked internal document pins the T-Mobile price at $199.99.
AndroidandMe reminds us of the possibility that "T-Mobile might price the G2 higher than $199 and offer a rebate for the difference", which wouldn't be too strange. Android Central comments that "$199 is the sweet spot these days, and anything less is really just icing on the Android cake, is it not?"
On a related note, the Best Buy Mobile page indicates that the name of the keyboard hinge on the G2 is called the "Z-hinge" by HTC.
Radio Shack announced on their Twitter account here that the phone will be available through them for $149.99, but make no mention regarding availability, other than telling followers to "stay tuned for info." They would be making a big mistake (in my opinion) to delay their release longer than Best Buy's or T-Mobile's release
Image from AndroidandMe
Source: Best Buy Mobile