I'm also considering WebOS if I get desperate.

Not too smart to make the "we're moving to Win Phone 7" announcement less then a week after HP blew it out with all of those amazing new WebOS device announcements.

I've been looking over at WebOS Internals and while they don't seem to have nearly the home brew support of Maemo, they do have some interesting packages available on their repository including Upstart, VNC, QT libs, and a full X server and associated libraries.

VERY promising. Even if it's not as true an X11/Linux system as Maemo out of the box, all of the ingredients are available.

Check out the preware repo contents here:
http://git.webos-internals.org/