I am interested in the discussions on groups and blogs- have listened to the last meeting. I think that George Siemen's comments around what style each environment encourages is so apt- the groups tend to short chatty pieces, while the blog both allows for and encourages longer, moire reflective work. As for where the "community" happens, I suspect that Sarah's idea that the blog groups that spring up spontaneously around a shared interest have more motivational pull and real purpose for existance than the managed ones- I guess my comment to Rachel on the hospitality blogs is to do with that. They always seem to me to be thinly disguised advertising.
Willie