other iPhone features I want

Whinging about the iPhone earbuds got me thinking about some other iPhone improvements I'd love to see ...

Apps should be able to write to the home screen. When I'm listening to music, I like that turning my iPhone back on means that I get to see what song is playing at that time. It's a nice little touch. I'd love for other apps to be able to put info there. For example, I really like the Maps app (which I keep on typing as "Mapps", natch). It finds my current location, I tell it where I'm going, and let it route me (and hope that no-one notices when it tells me to do an illegal manoeuvre, as it did when I was in Columbus a few weeks ago). If I turn off my iPhone while it's in the Maps app, or if the iPhone powers down on its own, I'd love for the place that I left off to be what's visible on my home screen. I'm often returning to Maps to see whether it's time to turn yet, this would save me a couple of swipes while I'm driving in an unfamiliar location.

Along those lines, I'd like to be able to customise the home screen. Yes, I know, I can put my own picture there (which is currently a picture of my cat). I;d love to be able to customise that behaviour better. For example, I'd love to be able to have the calendar view what's visible there all the time. That would save me a few swipes on my iPhone, since I'm often using it to figure out where I'm supposed to be going next.

ObDisclaimer: I haven't looked at the beta SDK, so I have no idea whether this is possible. The beta SDK is still under NDA, so please don’t comment/email with any details about it. :)