I too would like to see some expansion - certainly there is a case for non-TSR, as well as some of the earlier smaller non D&D systems.  I regularly find myself searching the forums for some bit of print run or pricing information on a non-D&D item.  So it would be great to have it up there.  An intermediate step would just be to just gather it together as text (afterglow stylee), then if the hands were available, to organise it into a more formal and illustrated system. And unfortunately like almost everyone else here I also do not have the time to jump in and organise this.  

However I do have some time, and am willing to help a bit.  If someone were to organise the beginnings of a moderate expansion, I would be happy to give up an hour or two a week to do whatever was needed to help online.  If enough people were able to help a little - and if the work could be split to match - some expansion might be possible?