I'm an intermediate Catalyst user, developing mostly on Ubuntu and occasionally Windows. I have worked with dojo, but my JavaScript library of choice is YUI.
See my developer profile at ohloh.net
I've also created http://www.wikivs.com/wiki/Catalyst_vs_Ruby_on_Rails.
Below is an XSS. For reference, to edit this page, go to http://dev.catalyst.perl.org/wiki/dandv.edit