This documentation is not using the current rendering mechanism and will be deleted by December 31st, 2020. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
This list has been radically edited for version 0.9.9 after being the unchanged TODO.txt in the doc directory for a rather long time. It is now much shorter but still needs some points to be checked and added.
However, since the stable release of DBAL 1.0.0 with TYPO3 4.3.0, the goal is really to support as many extensions as possible rather than add fancy features...