If you're making an app, you ought to be making an entire portal to your product. It's bad design to want users to use two separate, different-in-intent applications if they want full functionality.
The grandparent is thinking "Every application should do one thing really really well, and everyone should have a bunch of applications".
You're thinking "Every application should be full featured and do everything relating to a specific goal. You only need a single application for every task you do."
If this was the Facebook iPhone app, then by all means everything you can do in Facebook should be in there, but given how Posterous goes the opposite direction (in regard to complexity), a "do everything" app would be out of character, don't you think?
If this was the Facebook iPhone app, then by all means everything you can do in Facebook should be in there, but given how Posterous goes the opposite direction (in regard to complexity), a "do everything" app would be out of character, don't you think?