Can Google view all of my e-mail in Google Apps?

BUT in reality a threat from Google is really on the very slim side of risks to worry about.

Google Apps is as secure as any mail service hosted by a third party and is audited independently.

• Google employees can only access your domain having been granted verified access rights by your own networks administrators.
• They cannot day to day access your mail without express rights being granted by the administrators of your domain.
• This link gives info on many security and privacy questions asked by users, often sorts the issue to a reasonable degree of comfort. http://www.google.com/support/a/...

Their security and privacy is also audited by  independent third party and to international standards :)  http://www.google.com/support/a/...

So whilst in theory technically possible, nothing anywhere that is on the internet is 100% secure whatever anyone tells you, whether the service is in-house or not...Sony springs to mind BUT in reality a threat from Google is really on the very slim side or risk to worry about.

Hope that helps