I've put together an auction value spreadsheet which incorporates my values for hitters and pitchers, too. Since auctions are gaining in popularity with ESPN, Yahoo and CBS all offering the option, I thought it wise to offer some sort of guide post for the fantasy world.
I also managed to grab values from 3 sources and average the auction values. Here's the link to Google Docs where my 2010 MLB Average Auction Values spreadsheet resides. I am not entirely certain this is the best source of information for those of you in auction drafts, but consider it as another source. My advice is to find a source of auction values that you trust and run with that. Oh, and don't forget to adjust for inflation.