Although I’m not remotely religious: praise the freakin’ Lord! I can’t tell you how many times I’ve unplugged another USB gadget on my Macbook Pro to plug in my iPhone or iPod Shuffle. If you’ve got the same laptop then you know what I’m talking about – 2 USB inputs just isn’t enough.
The 3 Port USB Hub with Line-In Dock connector for iPhone/iPod does exactly what it says: adds 3 USB ports to your computer while providing a 30-pin plug for your Apple iProducts. You can by one – I know I am – for $15.