A few of the admins got together last night to talk about the future of PDX Strobist. We feel to keep the group successful there is a certain amount of planning and direction is needed.
That being said, one of the ideas that came out of the night was to have a facebook group page. It is not going to replace the flickr site in any way, it is only meant to be an additive. Flickr has its short comings; messaging and calendaring, that we hope to leverage in facebook.
In the end, all the information will be contained in flickr, so if you don't want to join the fb group, you don't have to.