http://www.testicularcancer.org.uk

First is there a module to produce an RSS feed

Secondly is there a theme repository to get some new themes?

Thanks for looking

There are plenty of places to find themes. Check our download section and browse the themes part. You will see links to the developers of the themes and you can look on their websites for even more themes that aren't available here at this time.

Do you want the rss module to produce rss feeds from your site? Some modules already have this option included. Do a search on this site and you may find a module that will do want you want.