AT&T has officially announced plans to deliver their 3G CU575 “Trax” clamshell. Touting 850/1900MHz HSDPA 3.6Mbps-capable downloads and quad-band GSM, this flip fancies itself a part-time media player with the inclusion of a Touch Pad bar and up to 4GB of microSD expansion for your AAC, MP3, and WMA music files. Still no word from AT&T but we expect the announcement later today with all the pricing detail you crave.