This is the first time I have ever heard of a PHP accelerator before; I find this a bit sad, because I've been running a server for a while - you would think I would have heard of such a thing before.

My server isn't using any accelerators for PHP; are accelerators only necessary if we experience slow speeds on large scripts, or is it good for all purposes?
Just curious. . .
FaSan: Aren't CGI and CLI the only modes that PHP will work in? I think there is one other mode, actually, but I can't remember its name.