Online LLM in Tax

I’ve been kicking around the idea of earning an LLM in taxation. However, I don’t want to leave Phoenix and so I’m researching what law schools offer online LLM’s. So far I’ve only found four schools that offer LLM’s in tax completely online; New York University, Boston University, University of Alabama, and Denver University.

Are there any schools that I’m missing? Any opinions about the value of an LLM in tax? Also, what’s BYU’s deal with not offering any LLM’s to Americans? It could be a real cash-cow for the school.