I’m trying to figure out a method for this too. I’m working on a new blog for myself, and my old one was drifting towards being a photoblog. For this reason, I want to have a regular blog with all entries, but a more photoblog-like theme (less clutter to distract from the photo) when you click the permalink for a photo entry, and maybe an option to show just blog entries or just photos.
Possibly I could have a second blog syndicating just the photo posts by RSS, and have the permalinks point to the photo on that second blog?
Ideas?