Lots of stuff has been written about the Reaver Guild, and guild quests, so I'll just put a couple links here to that info, but this spreadsheet will help you keep track of which armours, weapons, shields, and clothing you have reaved.

Here are a few handy trigs for Reaver, for TF. Mostly hilites, but there is a trigger that will tally your total spites and total races for prayer to destruction output.

Anyway, here are the links to a couple of nice Reaver info pages: