Margo - it's actually not that bad once you read the FAQs posted and read through some of the other bids that have been put in in the past - you'll get the feel for how it works pretty easily. I've done it twice now and had great success. I highly recommend doing Priceline and using BiddingforTravel.com to use Priceline more effectively. Though Todd's a pretty good resource too. :)
Masaki