Apple today released Digital Camera RAW Compatibility Update 2.6 which extends RAW image compatibility for Aperture 2, iPhoto 08, and iPhoto 09 for the following cameras:
• Canon EOS 500D
• Canon Rebel T1i
• Canon EOS Kiss Digital X3
• Nikon D5000
• Olympus E-30
More info and download link (3.9MB) here.