Filed under: Web services, Social Software
Swaptree: like eBay but without the money
All you have to do is type in an ISBN number for the books you want to trade, or UPC code for your other media. Then list the items you want in a "want" list, similar to an Amazon wishlist.
Swaptree will automatically search for users who have what you want, and want what you have. When it finds a potential trading partner, the service will send you each an email. If you both accept, Swaptree will provide each user with the others' mailing address.
You can even print shipping labels directly from Swaptree. And with media mail rates, most items should cost $2.50 or less to ship.
The service is in private beta at the moment, but Justin's got a few invites to give out.

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With Halloween fast approaching, it's a great time to get in some practice defending your territory against zombies. In Graveyard Shift, you take aim at zombies and other creepy-crawlies, blasting them into splatters of cartoony green guts. It's a casual first-person shooter, and it's very easy to get the hang of - use the mouse to aim, click to fire. Graveyard Shift has at least 15 levels, and it might even have some secret stages I haven't unlocked yet.
They key to getting good at Graveyard Shift is learning to use ...
