How many forums do you need? How many genres are you going to cater to? Is there a separate forum for Twilight, a separate forum for True Blood, or do we group them together under Vampire? What about fantasy genres that include vampires, where do you put those? But if you group all of them under Fantasy, what happens when you have a separate forum for NRPs, but a fantasy NRP? Does it go in the Fantasy forum or NRP forum? 

Too much headache. This will be alleviated by the Tag system when it's implemented. Until then, patience and Google Search (use "site:roleplayerguild.com" to narrow down your searches) are just fine.