According to the Shift Payments FAQ you must reside in one of the following states to spend bitcoin via Coinbase:
AL, AZ, CA, DE, DC, GA, ID, IA, KS, ME, MS, NE, NV, NJ, NC, ND, OK, PA, PR, SD, TX, VT, WA, WV
See http://cointelegraph.com/news/115114/localbitcoins-stops-ser... for example.