These are great questions, and exactly the sort of feedback we need. (Again, this is our first foray into the Linux world.)
I have to admit that the Xandros distribution was chosen at least in part because of the Eee PC. As you may know, that device has become very popular, and this definitely influenced us.
I suspect that once we work through most of the issues on this beta, we'll begin working on other Linux platforms as well.
Hope that helps,