I'm currently using it and I definitly like it. I also installed it on my brothers old 700 Mhz Athlon because he didn't want to use win 98 and XP wouldn't run on it. So I gave Xandros a shot and he definintely likes it. It's very easy to use as well.
Here's a comparison chart detailing how the OCE version is different from the retail versions:
http://www.xandros.com/products/desktop_matrix.html
If you need any help with Xandros, visit the forums at:
http://forums.xandros.com
In response to Marco2's question about Corel Linux, I believe they stopped samething with WordPerfect for Corel.
If you want it available for Linux, people need to start contacting these software companies and request that they make software for Linux. I've done that for Canon drivers, Google's Picasa, Corel, Filezilla, Macromedia etc. The more people that request it, more likely they will do one as they state in on their sites.
So far Ahead Nero released a version of their burning software for Linux and just recently Adobe released the new version of Acrobat. Keep bugging them and let them know how easy it's getting to use Linux, especially with Xandros and Linspire.