Info on a slew of incoming handsets and a popular tablet/mobile-internet-device has leaked from AT&T to gadget blog Engadget.

First on the agenda is the hot Samsung Galaxy Tab tablet/mobile-internet-device (MID).  Packing a 1 GHz Hummingbird processor and some sweet specs into a 7-inch package, the device looks to be one of the top Android tablet options in the near future.  The device has already been confirmed for Sprint (3G/4G) and Verizon (3G only).   Now, leaked snapshots of an AT&T branded Tab confirm that the device is headed to Ma Bell.

What's more the Tab will be joined by three other new Android devices, reportedly, all of which will launch "prior to December."  There's no telling whether these other devices are tablets or smartphones.  The latter seems more likely, though, given that most prospective Android tablets (like Motorola's Android design) are expected to hit in Q1 2011, when Android 3.0 "Gingerbread"pops up.

Moving along to Windows Phone 7, AT&T is apparently taking its promise to be the "premier" Windows Phone 7 carrier very seriously.  With the new smartphone OS rumored to launch October 11, AT&T is reportedly readying as many as three WP7 handsets in time for launch, and will launch three more during the holiday season.

Of the rumored launch products there's a Samsung Cetus (i917).  The handset looks somewhat like a Palm Pre with a glossy case, but there's no indication that it's a slider.  About the only thing currently known is that the phone will pack one of Samsung's attractive 4-inch AMOLED screens, like the screen on the Galaxy Tab.

Also incoming is another Samsung set called the "Focus" and an HTC model called the "Surround".  With six total high-end handsets landing, it seems clear that AT&T is working to make good on its WP7 promises.

Rounding out the leak, AT&T is apparently showing some love for those loyal customers who are staying on the BlackBerry boat.  The carrier is sprucing up its $199 (with contract) BlackBerry Torch 9800 slider.  The slider, which sports BlackBerry 6.0 OS, will get three limited edition color schemes in "mid to late November".  The schemes will reportedly be an all-white version, a positively Droid-esque red / black model, and an olive-colored edition.

With a deluge of new smartphone products from non-fruity companies incoming, it's clear that AT&T isn't losing any sleep about the possibly upcoming loss of iPhone exclusivity.