MSI Wind PC Intel Atom 1.6GHz/ Intel 945GC

The MSI Wind PC Intel Atom 1.6GHz/ Intel 945GC/ A&V&GbE Proprietary Barebone System is a mini PC setup which comes with a PCI-E slot if you want more horse power. 

Specifications
• Mfr Part Number: 6667BB-003US
• VESA-mountable Nettop Barebone without ODD Drive Bay
• Processor: Intel Atom 330 Processor(1.6GHz, FSB 533 MHz, 1MB Cache), FSB 533MHz
• Chipset: Intel 945GC & ICH7
• Memory: 1x DDR2-533/400 SO-DIMM, Max Capacity 2GB
• SATA: Support a SATA2 HDD
• Audio: Realtek ALC888 Azalia 8-Channel Audio CODEC
• Video: Integrated Intel GMA450 Graphics Controller
• LAN: Realtek RTL8111DL PCI-E Gigabit LAN; 1x Wifi Antenna included
• Drive Bays: 1x 3.5" Internal
• Ports:
• Front: 2x USB 2.0 Ports; 1x Card Reader Slot
• Rear: 2x USB 2.0 Ports; 1x VGA Port; 1x RJ45 Port; Audio I/O Jacks
• Expansion Slots: 1x CF Card Slot; 1x Half-Height PCI Express Mini Card Slot
• Card Reader: 4-in-1 Card Reader (SD/MMC/MS/XD)
• Power Supply: External 65W, Active PFC Power Supply
• Operation System: Support Microsoft Windows XP
• Form Factor: Proprietary, 27.5 x 17 cm
• Color: Black
• Dimensions (WxDxH): 297 x 60.2 x 223 mm
• RoHS Compliant

The asking price is $148.99. Not a bad choice if you are looking for a small PC setup with a PCI-E slot.  

(source: http://www.ewiz.com/detail.php?name=MB-6667-3#)