All shows have been moved to new dates and all gigs will be confirmed as soon as visas have been issued.
Here is the official statement posted by Steve Ignorant on his blog:
"I'm really really gutted to have to let you all know that we have to reschedule our USA and Canadian gigs. There's a delay with the issue of the visas we require to enter the USA. We hope it will all be sorted soon but we will NOT be able to make the scheduled gigs.
I would ask everyone to please hold onto your tickets and give us about a week to announce new dates. We will reschedule as soon as possible and tickets will be valid for the rescheduled dates, however, if you think 'fuck it, I want my money back', then do that and I will completely understand.
Check out the entire statement on his official site.