This summer poet Ching-In Chen (link) gathered a number of writers — including me — to participate in an online collaborative poetry project, also known as the Collaborative Manifesto Remix Project. We riffed on words members contributed each day, creating a flow of inspiration / words / poems that were ours individually and jointly due to the intentional borrowing of words.
The Whistling Fire (link) recently published a poem by Ching-In inspired by the words of different members of the collaborative project.
Todd Wellman 
We need more collaborative writing/arts projects nowadays, definitely.