Another sub $400 PC enters the market this week available through Walmart in the US and ZaReason.com - Cloudbook. It has some great hardware specifications.
Additional Preinstalled and Linked Software
Mozilla Firefox, gMail, Meebo, Skype, Wikipedia, GIMP, Blogger, YouTube, Xing Movie Player, RythemBox, Faqly, Facebook and OpenOffice.org 2.3 (includes WRITER, IMPRESS, DRAW, CALC, BASE)
Hardware Specifications
1.2GHz, VIA C7®-M Processor ULV, 512MB DDR2 533MHz, SDRAM, 30GB Hard Disk Drive, 7" WVGA TFT Display (800 x 480), VIA UniChrome Pro IGP Graphics, VIA High-Definition Audio, 802.11b/g, (1) 10/100 Ethernet Port, (1) DVI-I Port, (2) USB 2.0 Ports, (1) 4-in1 Media Card Reader, (1) .3MP Webcam, (1) Headphone/Line-Out Port, (1) Microphone/Line-In Port, (1) Set of Stereo Speaker, (1) Touchpad, (1) 4-Cell Lithium-Ion Battery