Here's the first picture of the upcoming Samsung SGH-A737 cell phone for AT&T.
As you can see it is a slim slider colored in black and red, with what it seems an illuminated 5-way D-pad on the front. There is also a music-shortcut, a QVGA display and a digicam (with yet unknown resolution).
Finally, we know that A737 will be a 3G phone, supporting UMTS (and probably HSDPA) networks.
Stay tuned for more details.