I did a quick port of the Samsung Galaxy S (i9000) LWPs. They all work decently well, but the ocean one slows down the phone a little bit. I think this can be attributed to the stronger GPU in the Galaxy S.
My personal favorite is dandelion and that works very well.
They've been tested on Froyo (FRF72) and CM 5.0.8. I can't vouch for anything else.
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