[Brian]

Like one of the commenters on that article said, having to use an external server (of any kind) to notify the user of information that's already on the phone is a problem that Apple needs to address on their end.

In an ideal world, you shouldn't have to do anything other than sync OmniFocus in order to get your reminders. Right now, that's just not possible, so we're deploying this feature as a workaround and continuing to ask Apple to provide real notification options.

Push wouldn't work for iPod touch customers, which represent somewhere between a third and half of our potential customers. WebDAV, while having drawbacks, at least works for them. (See my comments on that article for where those numbers come from, as well as comments from Ken.)