It would be very nifty to have RSS feeds for picture galleries. It would allow me to create an instant photo blog :)
I doubt I am the first person to mention RSS for galleries, but I can't find anything in the documentation that leads me to think that this is a feature currently supported.
Being able to specify keywords in email sent pictures that could be used to select the gallery the photo ended up in would also be nice. Another nice feature would be to allow me to optionally say "no cut tags please".