Also, on the emulators you don't usually have Sense UI, Motoblur or any other custom crap the manufacturers decide to put on the real phones. At one point I had 10 Android phones for development & testing just to make sure everything runs the same way on all phones

Ahhh, "write once, debug everywhere", where have I heard _that_ before?

(for me, that was a lesson learned in 1995 doing Macromedia "cross platform" Mac and Windows development)

I'm also working on a book (which will be free) with Android tips & tricks for making your apps popular. Following only this book's tips I plan to get to a stable $3-4000/month with 160 work hours - the equivalent of one 8h/day work month. I am currently on the right track, making $300/month with about 16h of work.