I can include reiserfs kernel module in bootmenu installer so no custom kernel would be needed and we have more choices by default. Personaly I think ext3 or 2 is not so bad but still reiserfs might be good to try. Please report how it goes with reiserfs and how stable it is.

Also feel free to post links to proofs of 'catastrophic' nature of ext[23] filesystems :-) IMO anything is far better than plain FAT which is the default for memory cards and manufacturers still give lifetime warranty for that. Also most devices (cameras, PDAs,..) cannot afford write caching at all (due to possible data corruption on crash or drained battery) so cards should be manufactured with that in mind. I know for sure that all PalmOS based PDAs do not use any write caching at all so FAT table and data blocks is updated with every VFSFileWrite call. ext2 or 3 filesystem mounted with asynchronous writes is heavens compared to that behaviour.