I'm kinda in the same boat. I tried upgrading to "testing" and everything went great, except when I went to startx, I got a ton of errors that basically said about 1/2 the x installation was missing. I've tried apt-get and D/l'ed all the available X install files in "testing' with no luck. Everything says it's installed and configured, but no X. I am, however learning a lot more than I ever wanted to know about the command line.
If there's anyone out there with any ideas for a couple of "Debian-bit" idiots, we'll both be eternally greatful.