Which version of OpenACS are you planning to use? The photodb module is built for 3.2.x and it's actually included in the
OpenACS 3.2.5 release. I could wrap up a tarball if you'd like, but since I'm leaving the country today and won't be back for a couple weeks, you may just want to download it yourself 😊 I also patched a bunch of bugs after the 3.2.5 release, so you'll want to apply this
patch as well.
There's also 2 packages included in the OpenACS 4.5 beta release — photo-album and photo-album-lite. I haven't investigated them much.