I'm downloading XCode 4 onto my new Mac (10.7 Lion, so no DVD) from the App Store. It's taking several hours so I'd like to save the .dmg onto my laptop, so I can install it again without going through the download process.
Where is the file being downloaded to on my local machine?

~/Library/Application Support/AppStore/. – slhck Oct 4 '11 at 20:41