Shaze if the content is relevant to the meta tags ect... and you are not keyword stuffing and messing around with linking schemes then I would have to say NO besides unless you have every page in its own directory then most likely they will not get indexed with the exception if you point sub domains to such...
ex. ( PS. URLs don't work... just an example... )
www.example.com ( the index of the root will get indexed... index.html... )
www.example.com/ex1/index.html ( this too will get indexed )
www.example.com/ex1/ex1/ex1/ex1/index.html ( Would most likely be seen as spam... )
Whereas
www.example.com/a1/b2/c3/d4/index.html ( would not be seen as spam as a directory example... )
www.example.com/a1/b2/c3/d4/whatever.html ( may not get indexed unless you have a subdomain pointing to such... )
GFY has their threads getting indexed and they are using .php as to create dynamic webpages and they get picked up just fine by the search engines and they have many thousands webpages... I do not know if dynamic websites using PHP gets indexed like what subdomains do or if GFY has each of their threads automatically assigned to a subdomain... I am not sure... ask... I know I would like to find out... Ask ICE he is the admin here, and seems to be a nice guy.
I would be careful who's advice you take here at GFY... Contact Google directly via email and they will confirm what I am saying.
Later,
.