I remember the original avatars hack that had the option of displaying a drop-down list of file names. I rather prefer this method as opposed to naming the avatars to a number and have them downloaded by the visitor (wastes bandwidth and is quite a pain to have to name my old avatars to unidentifiable numbers).

Does a mod such as this exist or would it be possible to do?

Doesn't exist, but it's possible.

Would anyone be interested in creating one?

*makes a puppydog face* Anyone?

*bump*

Anyone up for making such a modification?