Acer introduced their own UMPC, the Acer Aspire One during the Computex in Taipei, Taiwan.

acer aspire one

Here are some of the reported specs:

8.9-inch 1024 x 600 LED-backlit display
1.6GHz Atom N270
512MB DDR2 SDRAM (expandable to 1GB)
1.3 megapixel camera, SDHC and multi-format media readers
802.11b/g, Ethernet, three USB 2.0, VGA, and 3.5mm audio out
One free mini PCI slot for WWAN
80GB hard drive (with XP) or 8GB solid state (with Linux)
2.5 to 5 hours between the 3 and 6-cell batteries in XP model, 3 or 7 hours on Linux
1kg (2.2 pounds)