I've backported the EBI1 BANK1 patches from Google's 2.6.32 kernel tree to 2.6.29, so you can get extra memory right now

Get this file: http://n0rp.chemlab.org/android/nexu...Image-

Boot to fastboot and run:
fastboot flash zimage zImage-
Enjoy all the extra memory. This will be in beta3 and the source is available at the CyanogenMod Github.