I'm kinda slow tuning in here. Nice job, by the way.
The part that interests me the most is the 2.2.17 kernel upgrade. I'm always interested in newer kernels for some strange reason.
The ext3 is a nice idea, and could be very worthwhile for many of us (PaulG ?). Personally, I'll pass for the moment (just too busy with other $tuff), but if I did convert everything over to ext3, then I'd also nuke ext2 completely from the kernel if possible, to save RAM.
The only glitch I can think of with that is the software upgrades (future) will expect ext2 rather than ext3, and may choke on the superblock since they use an unmodified kernel.
Cheers