I just read here http://talk.maemo.org/showthread.php?t=32786 that it's not possible to send arbitrary files via bluetooth on maemo5 and therefore with the n900. i wouldn't have never expected that such a basic functionality isn't implemented.

i "reposted" this info here, since i think that future n900 users should know about this bug & to get them vote for this bug
vote here: https://bugs.maemo.org/show_bug.cgi?id=5300

ccc1