I know Xpressyourcell has a few. They are dusk themed.
http://forum.xda-developers.com/showthread.php?t=614824
I have found other ones, but they fit VGA screen and do not stretch for the WVGA. These are nice for now, but hopefully we can get some more released soon.
MightyRoms with 2.5 have a custom Mighty Animated screen. CMYLXGO have created a bunch of themes for Mr.X rom and they have different color animated background that says Mr.X Rom.