Hello,
I managed to tweak and successfully build and run ActiveWriter for VS 2012.
Extension here: https://docs.google.com/file/d/0B61_pEmFiM2LZy1oRTZYUVNYdms/edit?usp=sharing
Source here: https://github.com/fernandofig/Projects/tree/master/activewriter/trunk/
Of course, use at your own risk: I can't guarantee that it's completely bug-free, all I can say is that it's working fine for me, both for new diagrams and for previous diagrams from older projects.
Hi,How is it going? I have an interest running it on VS 2012 also.... How can I help?