Samsung Focus, HTC Surround, and LG Quantum all outed a bit early on AT&T's Windows Phone 7 site

These details aren't supposed to be live yet, we presume, but AT&T's just posted full information on its Windows Phone 7 lineup over on its site. We've got the Surround from HTC, the Samsung Focus, and the LG Quantum -- and as expected, they're a slider (sorta), a slate, and a full QWERTY slider, respectively. The Surround is touted as featuring Yamaha speakers in its slide-out surround sound arrangement with 16GB of onboard storage, the Focus is "slender and light" with a 4-inch Super AMOLED display that we imagine is ripped straight out of its Captivate stablemate, and the Quantum's listed with a 5 megapixel camera. All three are listed as "coming soon," so we'll have to hold tight and see whether we get any release dates today.

[Thanks, Shane C.]