Might be worth thinking more outside the forum etc. Have an email signup on the site (using aweber or getresponse) for people to signup to get the latest info via emails etc. Try and send out a weekly or bi monthly update etc. Course, might be harder now to get people to signup than if you had started closer to the beginning. Nice to see a coin that's been around for a long time and is still being worked on though.
We have those things on frankos.org already. I think our mailing list is up to about 600. We normally do a newsletter about once month. Or around every important announcement.