1 idea for keeping a clean stage. The option of displaying in the text space a simple hyperlink which opens a popup text/metadata area.
So, for instance, a gallery could display (beneath, above, or on the side of an image) the Title as Text 1, and a hyperlink saying "more info" as Text 2 which opens a pop-up with all the remaining metadata (description, EXIF, etc...)
Or, an image could just have a hyper link as Text1 saying "info" with a popup for all the desired metadata.
This would help keep a very clean "image-centric" stage but still allow for rich metadata content within flash.
It would mean the ability to include all data without obscuring or offsetting the image in an awkward way.