Ubuntu 10.10 is still a beta version, i.e. not ready for full release
yet ( so I do question that it's promoted so highly on the Ubuntu site
with the stable release of 10.04LTS demoted to the secondary 'Download'
button on the right !).

When the full version becomes available on 10th October you may find
that updating to that is all you need to do. To test this, create an
Ubuntu 10.04 Live CD and boot the system with that and see if your
printer works correctly ( yes it will work from the CD, albeit a
little slower ). If it still doesn't work then try to install it on a
Windows system and see if it fails to print - it's possible you have a
faulty printer, it happens !!

FWIW I've no intention of upgrading 10.04 as it's a LTS one ( Long
Term Support ) that will continue to get updates for 3 years. This
relieves the pressure of having to upgrade every 6 months on my
working system, but I'll probably install the newer ones in Virtual
Box to see what changes are being made - it'll take a major one to
make me switch and join the 6 monthly upgrade merry-go-round again