Miriam Posner has just published a thoughtful piece on the alt-ac movement in Inside Higher Ed. She's very supportive of the movement, but warns that it won't be a cure all for the difficult job market in the humanities. Definitely worth reading.
The academic job market is in a perpetual state of crisis. Too many PhD's, not enough jobs, and lots of doctoral programs credentialing people for teaching jobs who increasingly have to look for alternative work within -- or outside -- academia. What's a person to do? For starters, you can check out the lively new discussion of what's come to be called Alt-Ac. Use this site to find resources, and/or to discuss the issues it raises with your friends and colleagues.