Important things first. There's only a 30-day warranty on this small form factor desktop, so make sure you give it a good thrashing if you buy it.
Could form the basis of an HTPC. It has HDMI(**). And includes Vista Home Premium. Too late to apply for the cheap Windows 7 upgrade (I think this ran out at the end of Jan. Might be worth trying though!)
Probably only 1 available so get in quick if you want it...
Series: Acer Aspire
System Type: Dual-Core System
Processor Type: AMD Athlon 64 X2 7450
Clock Speed: 2,400 Mhz
Main Memory: 3,072 MB
Hard Disk Memory: 320 GB
Optical Disc Drives: CD Drive, CD Burner, DVD Drive, DVD Burner
Graphics Chipset: NVidia GeForce 9200 (**) I'm 95% sure this provides an HDMI port.
Operating System: Microsoft Windows Vista Home Premium
Integrated Card Reader