We've had word, which we're confirmed, that you can no longer purchase the LG Quantum from AT&T, via their online store or on the phone. This ties in with our secret AT&T tipster who took a screenshot of the Samsung Focus and LG Quantum being discontinued. AT&T has just recently halted the HTC Surround too.

Second generation handsets have a plot to move into, so it'll be interesting to see the Samsung Focus S come to stores soon, not to mention possibly the Focus Flash or a Nokia handset.

Thanks, @toenies, for the heads up