There is some development for windows phone 7 themes for Cm7 out there. I have created my own, as has AlexD818 for MDPI - and we are sharing eachothers knowledge at the moment.
I also understand that 72ls1 [who is a part of this project - right? :D] has created a MIUI theme, and is working on a Cm7 one - which will probably trump my own :P
Criticism is welcome, and anyone here has my permission to modify this, but notify me if you do (:
I am glad to see that you have brought your work to our humble forum! I've gotten confused by the sheer quantity of pseudo-names, so I do not know if 72ls1 is one of us, but you can check our People tab on our home page to verify so. I have seen your work and it is quite impressive, I only wish CM7's Theme Manager allow external code through ClassLoaders to truly theme every component of the system.