Facebook Group pages

I have a (group) fan page on facebook. Does anyone know how I can get people from other similar fan pages on facebook to join mine? I've tired emailing members of other groups, but I can only do that a few times and facebook shuts me down for spamming. I know there must be a way to do it, I just can't figure it out.

Anyone have any suggestions?

Maybe you can try facebook blaster software.