no good results in exams, no good news about app — check the 715 bug, they use pr1.0 in SDK and not willing to update, while oauth2plugin on device there are no headers for it, and if even i add them manually they need greater version of signon =\ we'll wait and see.
Some thoghts on it are here - http://zogg.tumblr.com/post/18684845...nage-your-****
P.S. and yes i thought to start making tumblr client with my friend but wouldn't do it while i don't manage autharization, and i think brigning separete libs for that and putting inside my app, as ovi or apps4meego do not support separete dependies AFAIK is not kosher in my opinon