Apple has released Digital Camera RAW Compatibility Update 2.1 which extends RAW file compatibility for Aperture 2 and iPhoto ’08 for the following cameras:
• Canon EOS Digital Rebel XSi/Kiss Digital x2/450D
• Epson R-D1
• Leaf AFi 7
• Leaf AFi 6
• Leaf AFi 5
• Pentax K200D
• Pentax K20D
Digital Camera RAW Compatibility Update 2.1 is availbale via Software Update and also as a standalone installer.
More info and download link (2.4MB) here.