I need to work more on this. The "get image from DAM" side of the story is working great, but the "Upload image to DAM" isn't.
Chrissy did some excellent work, tho. We have a metapackage "resourcemanager" that's supposed to be DAM agnostic. Then the package "resourcemanager.resourcespace" that integrates specifically with your DAM (resourcespace, in this example)
We connected Associated Press and Reuters image libraries also - through the metapackage.
So, although it was meant for DAMs, it's ready to be extended to implement something for imgur or something.