I wrote this for my own organization.. but I released it under a real liberal Open Source License.
http://www.conceptofzero.com/code is the base directory. The license + code is there.. and there is some real nice docs. SDLManager2 is optional.. dont use it if you dont have the libraries to use it (read the docs for more info)
and Doxygen docs coming soon for the 2nd half (they do take a while)
enjoy.. and feel free to ask questions / give any feedback
Hopefully this will make SDL easier to use.