[LAU] how to mount usb-stick properly

[Dragan Noveski]

hi list,
i am just about to set up the mechanism for being able to mount an 
usb-stick/hd as a ordinary user.
up to now, i was that much successful, that i am able to mount as user, 
but i cannot write on it as user.
this is how the /etc/fstab line looks like:

 /dev/sda1       /media/usb      auto    rw,user,noauto  0       0

while mounted, /etc/mtab shows:

/dev/sda1 /media/usb ext3 rw,noexec,nosuid,nodev,user=nowhiskey 0 0

but if i try to move a file to usb-stick:

nowhiskey at murija2:~$ cp diverses/acpi01 /media/usb/
cp: reguläre Datei »/media/usb/acpi01« kann nicht angelegt werden: Keine 
Berechtigung
nowhiskey at murija2:~$


...which means "regular file ....could not be set: no permissions


does anyone knows the hint, what i should do different to get this to work?
any help would be really good, since reading the manuals did not helped 
here in this problem.

cheers,
doc