Is there an online (non-iPhone) solution?
 

Is there a way to view (not necessarily interact with by adding data or updating) your OmniFocus data online?

OmniFocus has an option to export as HTML or plain text. You could do this and then put it on your MobileMe account, or a similar webservice that lets you upload files, or even email it to yourself to read it from anywhere you can check your email. You'll have to re-export frequently to make sure that document stays up-to-date.