Just thought of a feature...
 

it's an old one...but a goodie i feel...

Make the category thumbs (Thumbnail for Main Index option) dynamic with the last picture uploaded to that cat..(or an option for it)...

cool huh?...i thought so :)

-T

(or an option for it)... make it category based meaning you can turn it on or off for each individual category. For example, enable it for each users personal cat...

Nice idea, I wouldn't mind seeing something like this implemented.