O.K., I got my Droid on December 31, and have hardly used my keyboard at all (in fact, less than this post). My Droid was built in November.. My keyboard LOOKS flat when you look at it. But if you open the keyboard and look at it from the right side, you can see an ever-so slight curve on the top of the keys against the flat sides of the d-pad.
You have to look close to see it, but it IS there... and it is absolutely NOT the "bubbling" that others have talked about in these forums..
I know its NOT that, because I took a steel straight-edge,and all the keys are even with each other... Just thought I would toss-in my observations on that.. (that And $20.00 will get you a cup of coffee from Starbucks)
On a side note, I would think that if your keys are "bubbling" on your phone after only a couple months or so, what will they look and feel like in a year??.. I hope that doesn't cause problems for people in the future.. It has been my experience over the years, that when (almost) anything "wears-in" quickly, it tends wear-out" rather quickly too... Again, I really hope this is NOT the case, because I love my phone as much as any of you..