Photo-annotating bot. A background project for a while has been to write a bot to help me annotate the fairly large number of pictures I post to picdiary (1496 at the last count). Creating a document of RSS-based metadata is a slightly cumbersome text-editor job every time I post a new set of pics.... [hackdiary]
Annotating my pics is also a problem. I'd prefer using a point and click annotation system (minimal typing) to annotate, then being able to extract the annotation to whatever format is needed: RDF, some useful XML schema, etc...
There was an interesting attempt described on the semweb page a few years ago, where RDF using dc: was stored in the jpeg headers themselves, with a jigsaw plugin to read them.
I've not seen any compelling system for that though.