iPhone 3.0 is here, so is 3GS… still no single inbox view.

This is freaking ridiculous. Apple, why must you make us click out of our inbox just to go check another account? We have to click back a number of times just to go check another account? WTF is wrong with you guys.

Blackberry has been doing this for years, every other smart phone out there allows you to do this, and it seems like it would be such a simple concept to implement. They do it in Mail.app already right? I can aggregate all accounts into a single view that then allows me to reply and read and reply to messages across different mailboxes from within the same view. There are other reasons why I don't use Mail.app, but that's besides the point. Why isn't this option or feature available on the iPhone? If I have 6 mailboxes to check each time I check e-mail, it's a pain in the butt to have to go through this for each one.

Maybe there's an app that does it? Or maybe there's a way to trick the iPhone into doing this?