Over at Alan Hirsch's place, The Forgotten Ways Blog, are some provocative statements and interesting dialog just now about the nature of organic networks (and so organic church) and the value or problem of institutions for them.
It's not the typical kneejerk "movement good, institution bad" sort of rhetoric one sometimes finds. Alan's point is more subtle and nuanced than that.
Go give these threads a read... and let's talk about this some over here, too.
Peace in Christ,