It looks like Coinbase has added the ability to directly buy/sell ETH on their site without having to first transfer BTC to their GDAX offering. I wonder if the timing has to do with the recent success of the hard fork? They do mention it in the post as if to caution people as to potential volatility.
From the coinbase blog:
We are pleased to announce that Coinbase is adding support for Ethereum. Consumers can now easily buy, sell, send, and store Ether in their Coinbase account. To get started, visit the “Trade” page on Coinbase.com or tap on “Buy” or “Sell” options in our iOS or Android apps.
