It's been a while since I blogged about the best freebies in or for SL. This morning I visited Animazoo, which is an animation company in world, and a maker of motion capture suits in the real world.
Animazoo has a wide variety of dances and moves, which look to be a lot more SL-friendly in general than Sinewave (many of their anims are very fast and look odd in SL, athough some Sinewave anims are great). They have quite a few free, no-transfer, animations, including dances. They're definitely worth checking out.
There's also a weblink to free resources on the net for animations, including a link to the real ife Animazoo page where there are more free animations, in the bvh format which can be uploaded to SL.