We have an HP J6450 All in One Wireless Printer in our house and it
works great with Ubuntu (tested with 10.04, 10.10 and 11.04). The
printer itself is about 2 or 3 years old, but from what I understand in
Ubuntu just about any HP printer should work without any problem. The
nice thing about wireless printers, you can place them any where in the
house.