Apple released OS update, v10.6.4, today. Word is that it adds tethered capability for the Canon 1Ds Mark III , Canon 5D Mark II, and for other Canon bodies. 10.6.4 also updates the way Aperture 3.x handles metadata, making it more widely readable in third-party programs.
I look forward to testing both of these changes. With tethering, Canon’s DPP and EOS Utility have been rock solid but since all my files end up in Aperture, it would be great to cut to the chase.
With metadata, issues have arisen due to inconsistencies in standards between programs. A case in point, Photoshop doesn’t handle metadata consistently between Bridge and CS4. With Aperture 3.x, neither Bridge nor CS4 read all of Aperture’s metadata but Bridge read much more of it. Regardless, it’s incumbent upon Apple to make Aperture as metadata friendly as possible – most images end up in Photoshop at some point (if not in-house, then when they reach the client.) So, the situation where CS4 deleted most of the metadata if an Aperture produced file was re-saved in Photoshop was unacceptable.
6/16: Metadata updates/corrections are confirmed. Export a file in Aperture, open it in Photoshop, and then open File Info via the File menu. Everything is exactly where it should be – IPTC, Description, Caption, etc.
6/16: Tethered support: here’s the updated list from Apple.