Well, the webring, being self-selecting, is a good place to start as a list of links.
i'd be happy if more people would join the webring with their sites. (http://pd.klingt.org/webring/howto.html for info)
However, this is extremely decentralised, and I think that it's "friendlier" to newbies to present some sort of front page.
there's quite a lot of "front pages". the problem is, which one you should select to start at ;)
seriously: i think the only clean solution to this topic would be if the main developers agree on a common web platform. as long as miller,iem,jfm3 and others have different sites for pd, searchtools like the webring will be the lowest common denominator.
regards d13b