Now that Google Latitude works for the iPhone is there a way we can have it running in the background? And if I used "Backgrounder" on Safari while running Latitude will how often will it update my location?

I think it would be cool if someone could build and app that ran in the background and updated its location every 30 minutes or so.

There was an app similar to this I had that updated its location to a website incase the phone ever got stolen so we're nearly there...?