This is sorely need feature. I often read in bed, ebooks and browse the web. When doing so I like to lay on my side and thus the phone is "sideways" which puts it in landscape mode, but since I am also on my side I need it to display in portrait mode. It is completely usless as a reader for me without being able to do this! I have tried all of the "stop rotation" apps in the Market and they do not work with the XT. any ideas?