Been thinking about doing this for a while now, and as of today, owners of the iPhone and iPod Touch can point their devices to: ocf.berkeley.edu/iphone for a slimmed down essentials-only mobile version designed specifically for this viewport. There are some goodies in there, including the phone number linking to your dial pad, or the map location linking to your built-in Google Maps.
I've tested it against the iPhone SDK's simulator, and against Safari in general, and we'd love any feedback you have. For those of you without these devices, you can play around with it with TestiPhone.com, though it should work with most devices with similar viewports. Or you can simply view screenshots. And of course, you always have the option to view the full versions of these pages in these devices.
I have plans to develop a more general mobile version for other devices as time permits. Keep posted. Coming to a device near you.