If you are like me and don't have a spiffy Garmin to keep track of your pace, nor do you want to have to do all the math during the race in order to figure out if you're on pace to run your goal time, you can create your own pace bracelet! And it's free. Just go here.
Type in your goal time, and it will spit out a nifty PDF file with your marathon pace bracelet-- print itout & laminate using clear packing tape, and you have your own customized, waterproof (for the most part) pace bracelet. Old-school, but it gets the job done.
(Screen shot of the one I just made for this weekend is at the left)