Just found this site (might be old) showing you how to make a paper (!) iPhone desktop charging stand!
Dessine moi un objet » Blog Archive » Iphone and Itouch paper stand / dock
I've quickly tried it out using normal paper and the concept seems to work perfectly, took me 2 minutes to make. It reccomends using 270mg heavy card, which makes sense otherwise it won't be strong enough to support the iphone.
I am so pleased with this discovery! Solves one of my main problems which was finding a docking station or cradle which can hold the iPhone in it's case - plus, it means I only have to buy a spare USB cable! Double bonus!