I was going to look through the older games on the site for entries on the "" thread. That is when I came to the realization that there are [font=Palatino Linotype][/font][font=Palatino Linotype][/font][font=Palatino Linotype][/font] of works on this site!
I'm sure that the site admin has better things to do than reorganize games from five years ago. Even if they had the time a cross-referenced index of genre/approximate page length/author/date/and which contest its from is a tall order. (Of course, given the disparity of types here, I'm not sure if that is even a reasonable set of categories.)
So how can we bring more people to the older parts of the site? In the first (last?) 8 pages I found at least 30 good games from between 1/1/04 and 5/3/05.
One possibility a 24 hour supplement challenge. Go back, to a date before May 13, 2007 (what, my 24th birthday isn't an adequate cut-off date?) find a game you like, and create something new to revitalize it. This could be a dungeon map/scenario pack, new rules, characters and equipment... A general test of being on a creative team rather than making a game in isolation.
Beyond that, most of my ideas involve edits to the code of the site (ie a list of pages at the bottom, breaking it up into 5-8 page chunks)