If you don't have a Harley-Davidson, and you've been looking for new and interesting ways to dock your iPhone 3GS or iPhone 4, then maybe a keyboard is more to your liking. This fancy thing is called the WOWKeys, and it comes from Omnio. This is, as they put it, a "Made for iPhone" keyboard, and it will fit your iPhone 4 or iPhone 3GS perfectly. It's perfectly compatible with your Windows-based PC, or your Mac, and the iPhone+keyboard offers plenty of hotkey features for those looking.
There are 15 hotkeys for iPhone usage. Plus, if you find the right application, you can turn your iPhone into a media center remote control, an AirPlay media streamer when iPhone OS 4.2 hits, or a multi-touch trackpad. The hotkeys include a way to Pause, Play, skip a song forward or back, as well as increase or reduce the brightness of your display. You can even search, go through your photo album, or turn the display off. If you're interested, the USB keyboard/iPhone dock will run you $100 when it goes on sale in the near future.