Well, my 1st Droid only lasted from the middle of December until about 5 days ago when it developed touch screen problems.
I first noticed that my back button in the bottom left corner was working very intermittently or sometimes not at all. So, if I was in a browser, or a menu or even an app screen, I couldn't back out of it - I have to hit home and go all the way back there to get out of something.
Then, I noticed that when texting on the 'landscape' or horizontal on-screen keyboard, that anytime I pressed anything on the bottom row, I got the characters from the row above. So, I'd be hitting spacebar, but actually got a b or a c - even when using the tiniest tip of my pinky finger all the way at the edge.
Of course, the bottom row on that keyboard and the back button are both on the very left hand edge of the screen, so I thought maybe there's something wrong with the screen. However, on my home screen, I also have app icons in the same spots - and they work just fine to launch those apps - so that tells me the screen itself is fine.
I've done a battery pull, and a full factory reset and nothing has helped, so a replacement's on the way, but I just wanted to post this in case others run across this issue.
Also, if it means anything at all, the side I'm having trouble with just happens to also be the side that sits in the home dock - don't know if that has anything to do with it or not, or if any electronics in the dock might've affected the capacitive screen in any way or not.