Two Words...LogParser
Actually that's one word, but I digress. The excellent MSCOM OPS blog has some tips on using LogParser, one of their top ten ops tools. That wiley Prof. Windows has a great column on V2.2 here. The ScriptCenter guys have much goodness to share with you about this tool as well additionally also.
The ops guys are featured the week of 11/7/05 in a series of webcasts, don't miss it.