Steven Troughton-Smith pointed me to AppSales Mobile, an open source iPhone app that lets developers download & analyze their daily and weekly sales reports from iTunes Connect. It’s a great way to check your stats any time on the go.
Tip: When building an open source iPhone app (or any other app source code you didn’t create yourself), always make sure you set the code signing identity and app identifier, or you’ll get mysterious errors when you try to install it on your iPhone. I wasted a couple of minutes tracking that one down 
