I will always be biased towards the value of collaboration via wide-access curated ("mastered") websites (as opposed to Blogs), by this one surprise.
Late in the migration project, we got an email from an ODOT Surveyor who wanted to fill a vacant and very necessary leadership role for part of the survey scope. He was from a satellite office (Tulsa?); we had not met him.
"Thank you for your offer to help. I haven't met you. Do you know what's going on and what we need?"
"Yes, I've been following the website and keeping up with all the developments since the beginning. I know what's going on, and I know how to help."
Out of the blue, because of the share-broadly-and-easily philosophy, we filled an important need with a resource we didn't know we had.