There are several text-mode games such as NetHack, Angband and Dwarf Fortress that still have quite an active fanbase and are thus visually similar to ZZT. Some banner links to them could help drive some traffic while keeping in the spirit of ZZT's limited graphics.
Since it's pretty much a requirement to be an ubernerd to be a ZZT fan/developer...why not some links to popular nerd comics like Full Frontal Nerdity?
Just a couple decent ideas to try and get some new eyeballs on the site and maybe a few more fans.
