Cockneys Vs Zombies will be screening at the Florida Film Festival, which runs from 5th-14th April (they don't have a date set for CvsZ yet). Details are at this link here, and there's a news article about it here, so if you're in the area, or can get there, and want to see the movie on the big screen, here's another chance.
Update: It's screening on Friday 12th and Sunday 14th April, at midnight and then 10pm. You'll be able to buy tickets from Sunday March 17th.
The US release is still happening this year, Shout Factory will be unleashing it soon enough, as well as Tower Block, so watch this space for more news.