The Design Studio for Social Innovation is doing great things in terms of getting artists involved in socials orgs. Here's their latest-- creating 7-month long residencies, where artists partner with social orgs. It updates the 1960s Artist Placement Group idea of getting artists involved in a business or the govt.
What I think is great about it is that many artists are passionate, energetic people who look for chances to make a difference, and who want to get involved. This helps with that.