YES, I've done this before too.

the /etc/fstab is auto generated at boot.

I THINk its in /etc/rcS its been a long time and I forget, search for it, I figured it out and posted about it last year.

Once you disable the auto /etc/fstab generation, you can add your own /etc/fstab entries in typical gnu/linux fashion. ext2 and ext3 are supported. JFFS and NILfs are also supported, I remember doing benchmarking for someone.

not fully supported in the GUI.

NOW if we could backport the ext4 patches from more recent kernels to maemo's now ancient 2.6.28 ...

or even a full port of kernel 3?

anyone?