I've also tested two quite recent nokia smartphones, equipped with microsd adjunctive memory: an E51 and an E90.
With sfdisk -l both showed sda1 to 4 after connecting with h-e-n, which is the first weird thing because they should show two partitions only (internal and sdcard); also, the partitions appeared empty.

A cheap Chinese mp3 player with 2 gigs on board didn't get recognized in any way.

I'm not particularly interested in making those work. Anyway, if someone is interested I can attach dmesg output for each device.

All thumb drives I have work well, and this is what counts to me. Also two external hard drives with their external power supply I have, connected to a hub and from the hub to the n900, did get enumerated and could be mounted - for the NTFS one I did like in http://talk.maemo.org/showpost.php?p...5&postcount=10