After many (about 9?) years of work, the mid level (similar to orx, EEngine, ClanLib and SFML so you got an idea; SDL is intended to be low level) gaming library Allegro 5 has been released.
See: http://alleg.sourceforge.net/
Raw features:
-Merged all helping libs
-Hardware Acceleration better supported
-Multiple Displays and such modern stuff
Sorry for the lack of more precise information, but it seems their server/my connection is unstable at the moment.