That's because you're still on stock hboot, no better than before it was rooted.
- Install DiskUsage, enable root and browse to your /system partition.
- You will see a lot of free space on /system. This is wasted space.
- You can convert this wasted space to extra /data (internal memory) by flashing a different hboot with a smaller /system partition.
(You need to be s-off for the following, if you're not, use 'revolutionary')
- Nandroid backup
- Flash cm7r2 hboot using fastboot
- Full wipe and nandroid restore
- Go again to DiskUsage, your free space on system is greatly reduced
, and your /data will go up to 287MB
- This 287MB will be used for app data (e.g. saved game data), and will allow for more apps to be installed.
- You won't see your sd-ext reported in your total internal memory (i.e. it won't read 'internal + sd-ext')
- Keep your apps on 'internal' (don't 'move to sd'), this will trick them automatically to sd-ext.
- If you use DiskUsage to browse to /sd-ext, you'll see apps and dalvik cache there, which means it's working as it should.