One way to attract new members is by visiting devs of other emulation communities not to take them from their main hobby but get their interest in your community. They may not be full devs but they can still add a little code here and there from time to time which really adds up.
You are getting some news exposure. I've started up an emulation news site called
Wolflore not too long ago.
Shardwire still has links and some info even though its nearly dead and
Emulation Resource is reporting news from here.