All gadgets that you can charge (having a battery) need a certain wattage. If you have a gadget that doesn't need the full 10W, it'll only draw whatever it needs.
Let's say you have an mp3 player (I don't know the wattage of my iPod) which needs 5W. If it has a voltage of 5V, then the amperage drawn is 1A (1A*5W=5W).
So, yes, I charge my iPod on the iPad charger (because the iPod didn't come with one), even though the charger for iPad has more W.
And drawing means the device will pull the amperage it needs. If it needs less than the charger can provide, then it just draws that. Usually, if you have a gadget that needs more, it'll pull whatever it gets and takes longer to charge.
The iPad needs too much for a regular non-powered usb-port. As it would take too long to charge, Apple supposedly has prevented the iPad from charging via such a port (that's what I've read).
I hope things got a little clearer.
It's running on 10w so i know it will work on the iPAD since its labeled 5.1v 2.1a.
So just out of curiosity, i was wondering why Apple made an "iPod USB Power Adapter" on 10w if ever iPods do not use 10w.
That's because if the one power adapter will work with both iPods and iPads, why do you need two separate products?
Having separate adapters increases the chances of confusion and errors e.g. shipping the wrong item, users ordering the wrong item, dealing with two inventory items instead of one, which is unnecessary aggro for all concerned.
Apple are idiots then if they told you that you cant charge anythig besides ipad with the ipad plug, i do it with my iphone and a few other usb devices and nothing bad has happened.
Ipod 32 GB
Not everyone has to agree with your point of views, but at some point they need to accept Them!
What Apple did do, which seems odd to me, is have the iPad say it is "not charging" when plugged into a 5W supply. I can see it saying that if plugged into some sort of accessory that simply does not charge (like some clock radios do when iPods or iPhones are plugged in). But I think it would be better... and far more accurate, to say "Reduced Charge" than what it does currently.
Reduced charge sounds reasonable to me.
But then, if it charges much slower than on the charger, I can imagine people complaining to apple. So it seems quite obvious to me why apple decided to go this way.