If Wal-Mart's recently released $200 PC sounds like a potentially great deal but you're not sure about ditching your current operating system for the inexpensive, Linux-based Ubuntu box, head over to the developer's web site and download the bootable gOS LiveCD (or rather DVD, at 728MB). The gOS operating system sports an emphasis on web applications, with desktop shortcuts to tons of Google Apps, Facebook, Wikipedia, and other webapps built directly into the desktop. If you've given gOS a try, let's hear how you like it in the comments.