Hey Iph. Thanks for the reply. On the thread of the bridge plugin, someone said that the W3 plugin looked like it was working, but that it actually wasn't. Basically he was saying, he didn't notice any conflict or error message after initiating the bridge, but that he checked (I forget what) something and he noticed that the cache was not functioning. I'm sorry to ask the same question again, but you are certain that the W3 Total Cache works, right? I'm about to drop $140 on Xenforo and I'm just trying to make sure that I'm purchasing something that I can use.
I think what you say makes sense, I use the exclude option on my other site to run phpbb, but it's just that so many people were complaining that the bridge was not compatible with any of the cache plugin. I'm thinking, maybe they were complaining that the forum couldn't be cached with W3 and not their wordpress blogs.