Username: and/or..
Label: or...
Favs of Username: or...
Photos from set id:

Username is the bit that appears after /photos/ in the address bar when viewing a users pics
eg: http://zooomr.com/photos/bluemonki -- username is bluemonki

Sometimes the bit after photos isn't a name it's an id -- that's OK just enter it :)

Label is string of comma separated labels

Set ID is the number bit that the end in the address bar when viewing a set

small print: i wrote this because I could and no one else did, it does borrow quite a lot from the flickr badge maker, but that's because I want it to fit where the flickr one does -- not that I'm lazy :)
If you have any feedback or ideas for new features please send them to: bluemonki {AT} gmail {DOT} com