I agree with much of what you posted here. I'm not sure rituals would be a good idea, but a rationalist's version of Christmas would be nice. And of course, meeting in person, perhaps even hosting talks by various speakers from the local area and beyond might be of use too. That would require a more coherent definition of secular humanism than seems to be in vogue with the masses at large at present, though. I imagine something similar to the Singularitarian movement envisioned by Ray Kurzweil.