[Andrew]

The version of OmniFocus for the iPhone with local Bonjour syncing has not yet made it through Apple's approval/publishing process. So you can use it to sync from machine-to-machine with OmniFocus 1.5 (currently still just a release candidate), but until the iPhone version is released, you won't be able to use that to sync with your iPod touch.

However, if OmniFocus on your iPod will not even launch, that sounds like a separate issue, and I recommend you contact our support team via the Send Feedback item in the Help menu (on the desktop version of OmniFocus).