I believe the nexus is on froyo. I get 47 when on Evolutionv9 Rom. Froyo is fast as hell!
Oh just a small suggestion. The apps that you add could you move them to /data/app/ instead of /system/app/ ?
Reason being is when i update those apps then the updated version goes to app/data and i have a redundant version of the app in system not doing anything but taking up space.
Edit. Just noticed there is no exchange calendar sync support bummer i need that