Earlier today Apple silently released Digital Camera Raw Compatibility Update v2.4. This update adds RAW file support for the following camera models:
Canon EOS 5D Mark II Canon PowerShot G10 Pentax K2000/K-m Leaf AFi-II 6 Leaf AFi-II 7 Leaf Aptus-II 6 Leaf Aptus-II 7 Leica M8.2
The update is just 4.4 MB, requires a restart, and can be installed via either Software Update or the standalone download (see the above link). Enjoy, Alex.