If watching Dieter's quickie hands-on with the Touch HD didn't have you foaming at the mouth, maybe this will send you over the edge.
The Xperia X1 panels are now "fully functional" on the Touch HD. When we last checked in with the little experiment, there was no way to switch from one panel to another, never mind the stability issues.
But harvsingh over at XDA Developers says he's beaten those problems. He's doing a private beta and hopes to release a cab file soon. Keep an eye on this thread.
And because turnabout is fair play, don't forget that you can run TouchFlo 3D on the Xperia X1.