[whpalmer4]

I started a response to this thread yesterday, but judging from the absence of it here, I must not have pushed the "Submit Reply" button. Oops.

One thing that I'll add to Brian's remarks is that if you do the WebDAV sync (either with Apple's MobileMe service, or someone else's WebDAV server, whether a 3rd party or your company), your security is only as good as the security on that server, because the data is stored there in unencrypted form (though the transfers are encrypted by default, as Brian said).

Frankly, I wouldn't count on an iPhone resisting someone's efforts to get at your data for long. I'd give serious thought to whether truly sensitive data should be on something easily lost or stolen.