kawazu,

Apply these two patches (in same order) to your kernel source before compilation:-

http://users.tpg.com.au/sigm/2.6.8-filemap.patch
http://users.tpg.com.au/sigm/2.6.8-cloop.patch

Cloop is now in your kernel, so no need to compile it externally. Just enable it as a module in your config.

I use squashfs instead of cloop now. It has much better compression, but involves some miniroot modifications.

The patches will be there for a couple of days only.