Here is a quick iPhone 4 vector I made for a promo at work. Hopefully someone out there can use it (which you are allowed to do all you want...just give me some credit if you can). The icons are PNGs that I borrowed from around the web.
The dimensions on this guy are probably not 100% accurate, but it was a quick job where measurements weren't super critical. So if you need an exact, dimensionally-accurate copy of the iPhone 4, you may need to tweak this a bit.
Hope you like it!