Check out the sources at TYPO3-FORGE http://forge.typo3.org/projects/show/extension-t3flex
Please not, that the AS-DOCs on this site are very outdated, but my AS-DOC Builder is crashing all the time . you’ll find a lot of annotations in the source itself.
(Perhaps if somebody can parse the AS-DOCS for me )
The following video is the first (very basic) screencast, on how to setup the dataprovider @TYPO3

T3FLEX @ T3AK10 (Slides/german) (9MB,german)