You can trade BCI on stex.com (formerly stocks.exchange), but I've never had a positive experience with them and they have a bit of a shady reputation. I'd wait for hitbtc or bitfenix to open their wallets again personally.
Stex (nee, stocks.exchange) is everyone's favorite punching bag, but I've been trading on there for about a year and haven't had any major problems. In fact, their new site is nearly as good as Bittrex (heresy, I know!).