Hey....I know what you mean. I check this forum regularly but not much is happening. I think the problem is there are quite a few retro-clone/old school sites where the old school crowd already gather...in particular I'm thinking Dragonsfoot (which caters to all old school gamers) and Goblinoid Games (mainly Labyrinth Lord but everything gets discussed).
I also get the feeling that not many people know about S&S. There was a thread on Dragonsfoot where an old school fan mentioned that depsite being on various websites he had missed S&S completely. That thread is here:
You must certainly have a presence at Alive and Out of Print. It's a growing community and while it isn't as large or broad a concept as Dragonsfoot - it is a very friendly board that really wants to support games like yours.