As on habré PR great site oboobs.ru/
They have a widget for opera, but unfortunately there is no widget for android. No one would be interested to write?
Layer over the APIs I did (the link ob.mobile-master.org/b.jpg
each time a random picture), the source code of a similar project found code.google.com/p/url-image-widget/
Just need sehardcore url and do an automatic update (and configuring it accordingly)