Thanks all. They contacted me for an interview via skype next week. I was asked to give a few different times that work, so I sent that and am waiting for confirmation.

I am thinking of saying that my skills were not being well utilized. That is true, but doesn't sound so much like a gripe. I also may mention that I prefer working from home and that I was increasingly being asked to go into the office. It is somewhat true, we all worked remotely at first, and then in February he rented an office and we had to go there for meetings more frequently. This new job is 100% remote since the company doesn't even hava an office where I live. The postion I had from 2003-2011 was also a work from home situation with a supervisor based in another country, so I can say something like I really liked that situation and want to get back to working from home.

Wish me luck!