Summer is in full swing, but if you happen to take a peek at AT&T's leaked roadmap for the upcoming two quarters, you might just sense the chill of winter in the air. While this doesn't appear to be official from Ma Bell, or entirely exhaustive, we've gotten a spreadsheet that goes in-depth to out the carrier's upcoming smartphones. A host of Android devices are on the list -- all with Gingerbread -- along with two handsets that strut Windows Phone 7.5 and another duo with BlackBerry 7. Of particular note, we see the Samsung SGH-i777 (otherwise known as the Attain), along with the
