You can buy stuff from Ikea on Amazon! FEB 15 2012
One of the frustrations people have with Ikea is that you can't order online from them (at least in the US). You have to go to the store or hire someone to go to the store for you. Not sure when they started doing this, but you can now buy a bunch of Ikea products from Amazon...some items even have free shipping if you're a Prime user.
Update: Hmm, it seems you can shop online at Ikea...but the shipping and handling costs are insane ($129 to ship a $299 chair). Also of note if you hadn't already guessed...the products on Amazon are often more expensive than they are at Ikea. Mark up!
Update: Further clarification in case it's unclear...Ikea is not selling this stuff on Amazon, it's all third-party resellers. So caveat emptor and all that (and that goes triple for eBay). Ikea wants you in the store, not shopping online.