As supplies on the Samsung Focus and HTC Surround were flying off AT&T's shelves today, it appears that the LG Quantum will soon be joining the action.

AT&T is now accepting pre-orders for the LG Quantum with a expected ship date of November 15th with all orders processed on a first come, first served basis. Pricing is consistent with the other Windows Phones, $199.99 with contractual discounts or $499.99 out of contract. Of course you could also just pre-order it from LetsTalk for $99 and save yourself a bundle.

So, if you're holding out for a Windows Phone 7 device that has a side-sliding keyboard... now's your chance.

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