I had heard about the dust problem before, and was glad that I didn't have that problem yet... After reading this thread, I decided to look again.... Now I do
have dust in the bottom right
It seems to me that the problem is dust entering between the keypad and the screen, and then getting up underneath of the digitizer which doesn't seem to be against the LCD, which is strange, I think. Most handhelds I've taken apart have the digitizer glued around the edges directly to the LCD. Thank god that HTC and Sprint are actually addressing this problem. If someone does know how and where this seal is applied, I'd love to know. I might be taking mine back before too long, and I always would like to know what they're going to do beforehand.
Qualcomm QCP-1960 -> Sanyo PM-8200 -> LG LX550 -> Samsung Rant -> HTC Touch Pro -> HTC Hero -> Samsung Epic 4G -> HTC Evo 3D