1.
WindowsPhone7 v.2 Theme by Fireslave!! (ThrottleLauncher)
XDA link
WindowsPhone7 v.2 Theme by Fireslave!! VIDEO - xda-developers
Review and Video
Windows Phone 7 2.0 Theme for ThrottleLauncher UI (Video)
The video is of it running on a Sprint Touch Pro 2, seems to show the "feel" of WP7.
Here is a image..
After seeing the video, I'm like WOW..
2.
Windows Phone 7 Theme For WAD2 by Khrisstyan l WQVGA l - xda-developers
Now I found another one that looks pretty good overall and seems to have the animations like WP7. Looking through the video (I have not tried this yet, would like to hear from anyone who has)
Other areas look more like WP7 and scrolling like WP7 (example games and pictures). The only problem I saw is that all your programs did not populate like Fireslave's version.
XDA link:
!!! NEW, V.2.5 !!! Windows Phone 7 Theme For WAD2 by Khrisstyan l WQVGA l - xda-developers
Video (YouTube):
YouTube - Windows Phone 7 theme for WAD2 by Khrisstyan V.2.5
Image from post
3.
WP7UI, Standalone for WM6.5 --HOST-- V1.5 (colors)
This one is different that it does not requre an extra program like the others (WAD2 or ThrottleLauncher), it gives a real look like WP7 but, in other areas, not as much as the others. This guy says he is new at programming but, so far it looks pretty good. It is CRAZY customizable tho, check the video, you'll be impressed. I really think this will be the one to watch if you want to customize and still feel like WP7.
XDA link:
http://forum.xda-developers.com/showthread.php?t=685928
Video (YouTube):
http://www.youtube.com/watch?v=1eO2_AaPe74
I'll add more as I see ones that I like