Just a heads up:
Themes from [ROM]A Froyo Rom 2.2.1
will not work on Velocity. I will port Luna when I get time and Im sure GRZLA is already planning on porting JAMT and Elegant Steel.
Boot Animations found on the [ROM]A Froyo Rom 2.2.1
will work with Velocity.
Font Packages found on 261 Flashable Font Packs - Change your system fonts the easy way! - xda-developers
WILL work with Velocity. Just make sure you turn signature verification off in recovery