It is horribly out of date. If a recipe you are looking for isn't present in the archive, have a look at the newsgroup itself, or one of the more up-to-date archives (see the rec.food.cooking FAQ for details).
The archive was started on 14/7/93 and holds all recipes that were current in the newsgroup at that time, along with all recipes posted until some time in October or November.
All feedback is welcome. Particularly, feedback on the indexing. Email email@example.com, being as specific as you can.
Carnegie Mellon's School of Computer Science (SCS) graciously hosts the Recipe Archive. We invite you to learn about SCS educational programs and research.