everyone uses other people stuff, they use tons of code already implemented other places and change it slightly. i've reviewed alot of there code just for shits and giggles. its GPL open source, 99% of code used has been already coded somewhere else, changing a few lines is not inventing it from scratch.
key word... team KANG. The reason IMO CNA doesnt have as many themes as it gets its framework updated frequently which is a pain for themers, and there are not alot of requests to themers to port. they dont need to run the rom, just need to modfiy some apps and framework. and package it up.
Lets not have this thread turn into (you stole my work and i stole yours) its GPL. myself and many devs left XDA becuase of this kinda behavior. eeryone has there opinion and choice what they want to run, most roms have the same features as others becuase there just good features... period. 80% of the features people have including AOKP have originated from a Dev that coded it for CyanogenMOD. you can look at the mods and look bakc at CM froyo branches for those mods.
bottom line, if you want a theme for a rom, ask a themer, being a recognized themer i would assume that they are commited to sharing there theme to the community accross the board and wouldnt mind porting it to other roms. If thats not the case, i would then reccomend that themer designate that he/she only creates thems for said ROM, to loose confusion.
BTW a new theme chooser is being engineered for ICS, so this will all become null when that happens
