I think AM's question of "Any Perl+Ajax script available to upload images to server?" is a fair one. Just look at what you replied with. One example for CGI::Application, one example for Catalyst, one sourceforge project from 2005, one Perl.com article from 2006 and a big ball of mud from encodable.com*. I'm really surprised that no has written up a nice post how to do this with Modern Perl yet.
* Yeah, I've seen it. I wouldn't recommend it to my worst enemy. It's all of encodable.com's products rolled into one horrifying file.
Update: I missed the Catalyst link initially.