It's hard to share the same information with multiple groups when I need to be signed into different email accounts to get to the groups.
I just wrote a blog post about Jane Hart's recent work with social media and learning. An excerpt:

“Jane … recently established the Social Learning Centre to focus exclusively on how to encourage and support the use of social media for continuous collaborative learning.”

Full posting at

Sigurd Andersen
Walden, Peacham, CCSU