What markets currently accept ZEC and allow them to be traded for BTC? Thanks
Kraken and Poloniex.
Way more actually https://www.cryptonator.com/rates/ZEC-BTC
What Is ShapeShift, and how do I access it in Jaxx?
ShapeShift is an exchange service for converting between blockchain tokens and coins. As of Jaxx 1.0.2, ShapeShift has been integrated directly into Jaxx to allow for in-app conversion between all currencies Jaxx supports.
bittrex is good:slight
there are many now trading, small list http://fuk.io/zcash-what-is-it-how-to-mine-and-how-to-profit-trading-guide/