There might be a few keys left for the free stress test that lasts until saturday, so go check at www.fileplanet.com, if you have a gamespy account. I've got a key to try this out, might be an unusual MMORPG.
*edit*
You can also get a key at http://www.turbine.com/
*edit*
You can also get a key at http://www.turbine.com/