NICE! i am making a theme wich looks kinda like yours,. ;)  also with clock battery and loading icon in the main icon,.

If you want to make nice sub icons try and find a good dingbat:
http://www.dafont.com/

i have used almost 20 different dingbats in my next theme,. its so easy because you always get smooth icons! specially if you only use black and white,.