EXT4 needs work. The kernel hates me. But, it DOES work.
Sometimes this CWM reads/formats/restores the sd-ext partition, sometimes it doesn't
The most 'stable' is the v5 of CWM (Still has the issue of sdcard not usb mounting. But, I do have a 'clue' to what is really going on with it.)
CWM 6 'works', but many features are a bit buggered (Thus the "WIP" in the title)
I'm still working on them. I don't stop until they're done.