In fact it would be great if some professionals did submit their work to the group as it would intruct and train the amateurs. That said there are some fantastic amateurs who could teach the professionals a thing or two (fofurasfelinas and Dani Rozeboom come to mind immediately).
Anyway, these are the pages to visit:
- cat-photo-technique at Pictures of Cats (PoC) website
- cat-photo-technique at Flickr
- PoC home page for an example of a group member's work (as at 29th July 2009 - the pictures rotate so it won't be there for ever).