QNAP has posted firmware to enable Mac OS Lion access for its older NASes.
The new V3.3.2 firmware adds support for the Mac OS X Lion operating system, including full Time Machine support.
The update is available for the following models immediately: TS-409 Pro, TS-409U, TS-409, TS-209 Pro II, TS-209 Pro, TS-209 II, TS-209, TS-109 Pro II, TS-109 Pro, TS-109 II, TS-109.