[Ken Case]

(Our tech support ninjas are working very hard to answer email quickly, but with over a thousand new customers for a brand new product it's hard for them to keep up!)

Have you tried turning your iPhone off and back on?

If your iPhone is low on system resources when you try to launch, it might not be able to finish loading. (This can happen with any application, not just OmniFocus.) Turning the iPhone off and back on can sometimes help with this.