BTW, what mobile twitter app lets you upload a picture without using a plugin? There is a twitpic plugin via pixelpipe. I think that method is far more intuitive because you can send the pictures when in the picture gallery rather .
(...)and both have hardware keyboards. So the choice between the two comes most from Maemo vs Android. The choice is yours there. (and getting around that awful Droid keyboard; but that's personal opinion )