I think is a great site. It seems no matter what I am trying to research using a search engine Webmasterworld usually has something related on the first page of the search engine. One issue I would like to see it an area dedicated to Wordpress security issues, it is hard to fine good quality information on this topic not just on Webnmaster World but overall on the net.
As far as ads I would have no problem with it and would rather have that then the subscription area of the forums. I would like to see all the information open to everyone and just have ads on the site as a way to make money on the site.