Online Post-Masters Family Mental Health Certificate

I'm pretty sure UAB has one too.
Arizona State University has one.

I'm sure there are a few more but those are two I know of.

Good luck!

This was written awhile ago but I am posting my answer in case it may help someone else- there arr many changes happening in this area of certification.

The Adult Psch NP certification exam is being retired effective 2014
(see APRN Corner: Frequently Asked Questions - American Nurses Credentialing Center - ANCC), so most Adult Psych NP programs are now transitioning into Family Psych NP programs. The other challenge happening right now is that ANCC has set a goal to make all advanced practice nursing positions go for the DNP (Doctor of Nursing Practice) by 2015. So some programs have transitioned their post master's certificate into DNP programs- the downside to this is that it takes longer (at least 3 years) and is more expensive to get going.

One of the best programs I have found for post master's certificate NP Family mental health is University of North Dakota Online - they grant you instate tuition rate. Like many programs (online or not) you are expected to round up your own clinical preceptors in yuor home state.