Hi,
I just made a new ticket query in trac for all open bugs concerning
grass 6.x. It should catch those with missed milestones etc.
https://trac.osgeo.org/grass/report/16
There are a number to go through; I have broken them down by
component which is a lot more manageable. (many are just 5~10
bug reports to look at)
So please pick your favorite component/area of expertise and
have a look to make sure something wasn't forgotten. 
thanks,
Hamish