If you have at least $40 in coins lying around, you should consider taking them to your nearest Coinstar and cashing them in. For doing so, you'll get a to Amazon.com, Lowes, iTunes, or whichever other store you choose. The offer ends 12/06/09, so you've got almost a month to round up an spare change if you're short of the $40 requirement. So far I've only been able to find three pennies, a Canadian Loonie, and a Cheez-It. I've got a ways to go, but at least I've now got a snack!
Their FAQ states that an 8.9% processing fee is charged for cashing out ($40 * 8.9% = $3.56 fee), but it also says that if you convert your change into a gift card, it's free. So, for example, you could get a $10 and $40 Amazon gc or a $10 Amazon gc and $36.44 in cash.
Annye pointed out in the comments that thestates you have to exchange your $40 for a gift card, not cash. So on the plus side, you won't have to pay any fees, but you also won't be able to get pure cash. It's still a good deal if you shop at any of the stores which they offer gift cards for. Sorry I initially missed that!