In addition, I got motivated to work on it again; I had neglected the wiki for quite a while, partly because I was busy with tons of other projects (which I always am, so I guess that doesn't count), and partly also because it was a one-man project for a long time. Even after being mentioned on Slashdot, Newsforge and a bunch of other sites it never reached a state of halfway constant contributions from other people. But, it somehow survived while one or two similar projects I was aware of died away.
As it's the only project of its kind which exists at the moment (to the best of my knowledge) and I really think it's a worthwhile cause, I'll continue searching and adding more projects , in the hope that some interested programmers take over maintainance of one or the other... Any help and contributions are of course very welcome!
Joey: As for Xgalaga, it was not yet re-added after I switched from a custom-made CMS to a wiki, but it's there now. That'll hopefully increase it's chances to find a new maintainer ;)