just look at the reddit link, pretty sure anything to mt gox is failing, and any large orders.

Looks like zipzap will refund payments, but it takes 5-7 business days. Just got this from them.

"We are aware that BitInstant is experiencing processing delays. They are working on the issues now and we are in regular touch with them. Your funds are safe and all orders will be processed however if you would prefer a cash refund, please let us know and we will refund your payment in full. Attached are the forms that we need to you to complete so we can process your refund request.
Once you have returned the completed forms, we process your refund within 5-7 business days.
Thank you!"

At least zipzap is helpful.