Thanks Iwar - that is a great idea. I'm not finding an easy way to integrate the 'like' system from the forum area into the Gallery, but I may be able to adjust the rating system to do essentially the same thing so that people will essentially just vote for the images they like, instead of having to choose from a scale of 1-5.
Re: what's new - if you look at the submenu of the 'what's new' tab, you'll see an option for new blog posts, and under the 'gallery' tab, there is a 'what's new' feature there for new images as well. Getting them both to display on the main what's new page all at once is probably more development work than it's worth at this point.
Thanks again for all your suggestions - please do keep them coming!