Adult webmaster resource site?
 

Is there any good site with the reviews of all sponsors' sites, all categorized, which could you recommend?

I always think review sites are the best places to look for sponsors, since we regularly go inside their members areas. I'd recommend my own first..

http://www.adultsitesurfer.com
http://www.pornsumer.com

The other really great ones are

http://www.thebestporn.com
http://www.rabbitsreviews.com
http://www.porninspector.com