I wouldn't call them good solutions, because of lack of volume, but coinmkt.com is based in the US. I may try to use Ripple to deposit and withdraw with Bitstamp.net, but I'm not quite sure how great an idea that is yet.
There's also a Canadian exchange vaultofsatoshi.com. I think that is also suffering from low volume.
I did notice that campbx was extremely low volume yesterday (picking up today), probably due to the problems from Monday.
Yeah, It's kind of hard to trade on a site when you can't log in.
Thanks for the leads
Anytime! Meanwhile, CampBX's uptime has been much improved since Monday. I've been trading at various times during the day and haven't had any problems. Although they haven't been able to verify me still :/
Let me know if you try another exchange and what your experience is like!