Packagebot is project to aggregate metadata from the Portage tree and use it to create and update appropriate pages on the wiki. The source repository is at https://github.com/brantgurga/packagebot.
Packagebot is written and maintained by Brant Gurganus.
For an example of what Packagebot can do, click on Category:Ebuilds.
There was an idea that came up about having wiki content drive a Portage tree so perhaps there's place for some sort of reverse Packagebot too.