Usually you don't take apart your \$400 PDA, but the digitizer problems of my T|T have gotten so annoying that I had to. It's relatively easy; the biggest problem is all the stupid ribbon cables they used - which were the source of my problems, as well.
It seems to be working great again, but we'll see how long it lasts. The cables managed to work themselves loose in about 8 months last time; I suspect it won't take as long next time. I'll keep an eye on [Dennis]' T|T3 to see how it does ;)