I've created a small library of AS3 classes that simplifies loading data from the Kuler API
It handles all the parsing of the rss/xml data and puts it into Theme, Swatch and Comment objects.
I've placed the project on Google Code at http://code.google.com/p/colormunch/
The library documentation is on my site at http://beekay.biz/colormunch/docs/ (it's also available on the project Downloads page)
Really easy to use, just check out the Wiki page to get started.
I'll keep working on improving it, so any feedback would be appreciated.
I just posted about using this. I found it online and used it to connect to Kuler for my drawing generator:
Thanks for providing the classes. I'm not sure I would have managed it otherwise!