When you where working with Reiser did you ever look at ext3?

No, it didn't really exist in those days. A bit of googling turned up an 0.07 for 2.2, which sounds a bit more modern than your 0.02d. I haven't found a definite answer either way about ARM compatibility, but I doubt they'd have accepted it for 2.4 stable if it only worked on x86.

Peter