I've spent an entire day working on porting over a few of the available themes to Pl3x Rom v2.1.2 today, and its an extremely time consuming task for 1one person to do. So, with this announcement I am calling out to you to help me port, or even make, themes for Pl3x Rom.
I have included here two basic zips to help get you started. They are simply the framework-res.apk and the services.jar - One is for black text/date/clock, and the other is for white text/date/clock.
Use either one of these to make your theme, do not attempt to patch colors to these files yourself, as its a bit different on Froyo and it will cause the droid to bootloop (i found this out the hard way).
Thanks to you all that help!
Downloads for Pl3x Rom v2.1.2: (These are NOT update.zip packages)
Framework/Services Package for White Text/Date/Clock
Framework/Services Package for Black Text/Date/Clock