A company called iphone5mod.com has released the first aftermarket iPhone 5 dock and cable the product called the iPhone 5 Flash Lightning Dock is available to purchase now but orders will not start shipping until late October.
You can buy the cable and dock separately or as a package.
The cable on its own is $19.90 plus P+P
The Dock on its own is also $19.90 plus P+P
The Package is $39.90 plus P+P
There are pros and cons to the dock mainly being that is does not have Audio out but it will allow you to sync and charge you iPhone 5 and it will fit with or without a case on the phone too so there is no issue of taking your phone out of the case to charge it.
The iPhone 5 Flash Lightning Dock comes in 2 parts. A classic dock for the iPhone 5 and an illuminated Lightning Cable. You can charge and sync your iPhone 5 with the iPhone 5 Dock. Your iPhone sits upright in the dock as it syncs or charges, so it's perfect for a desk or countertop. It comes included with a specially made Lightning Cable that has an intelligent power managements system built in. You can actually see the flow of current going into your iPhone 5.
I have not seen the alternative apple dock as of yet but im sure that it wont be to far away.