An astute reader noticed an advertisement in the current edition of Rolling Stone, featuring HTC's 4G phones.  Besides the Evo 4G and the T-Mobile G2, we see the latest additions to HTC's 4G stable -- our friend the HTC Thunderbolt, and what appears to be the first look at the HTC Inspire 4G, headed to AT&T.

We still have no specs to offer for the Thunderbolt (I think we'll see those this week at CES, and they'll be very similar to the Desire HD or MyTouch 4G), and all we know about the Inspire 4G is what you see here, and the fact that HTC filed with the USPTO to trademark the name Inspire late last year.  Let's hope CES offers a bit of insight. Hit the break for the full page ad. Thanks Joseph!

HTC 4G ad