Martin,
That thread was actually just being discussed over the past week, and some
of us still have trouble. :-) As near as I can figure:
1) You want a very recent kernel (2.6.12 or later, I think), udev, hal,
and pmount.
2) You do NOT want usbmount or hotplug, as those are deprecated despite
still being in the archive and installing without complaining.
3) You do want to wait a few days for the latest version of udev to get
checked in and become available, as it fixes a bug that keeps it from
working with USB drives. :-)
At least that's my understanding, and I hope that waiting a few days will
finally get my <expletive deleted> USB card reader to work.