Trial Liquid Democracy for the TYPO3 decision making process using the "Adhocracy" environment.
I think it is worth to give it a try. If it proves unproductive or too much hassle after six months, we step back from it again and try other methods.
If the trial proves successful, successfull, it is worth considering if we want to host our own typo3.org instance of Adhocracy, or even consider using the alternative software called LiquidFeedback.