The iGo portable battery with Apple cable @ 1,700 mAh might not be the 10,000 mAh beast from Woot yesterday, but...
+ less than half the price.
+ its a lot more compact.
+ it charges directly from the wall without a separate wall wart since it has those handy collapsible spades.
+ it has pass thru charging so you can charge your phone whilst it charges itself.
+ includes an apple charge cable but it is the 30-pin variety so it won't work on your latest gen lightning plug Apple devices unless you have an adapter. (I recall, less than $20 for the small one.)
But don't be thinking this would be good for your iPad since it is limited to 1 amp device charging.