The Doomworld /idgames database was created by Linguica. All comments, questions, concerns, corrections, complaints, bug reports, gifts, and death threats should be directed to Doomworld, not Gamers.org.
The site works by downloading a conveniently provided list of all the files on /idgames. A script then checks to see what zips, if any, are new. The text files for those zips are then automatically downloaded and run through another script which attempts to extract meaningful bits of data from them. This data is then fed into the database and becomes immediately available.
A second version of the site, which would incorporate data and statistics from the WAD files themselves, is in the planning stages, but don't hold your breath.
The logo was created by Manc.