I've had a few folks write in asking if they can participate if they are waiting to adopt/don't have the kind of contact they'd hoped for/aren't in a sterotypical open adoption/etc. YES. As far as I'm concerned, if you write about openness in adoption, you're in. That goes for the roundtables, too. The whole point is that all of us are coming at openness from our own unique perspective, so we each have things to share and things to learn.
In fact, I think I'm going to make a new category in the blogroll who aren't comfortable claiming the "open adoption" label, but are practicing (and writing about) openness in adoption. Stay tuned.
PS This is my 500th post! Only took me three years. Heh.