For the moment I'm sure there are not many online stores that accept bitcoin, if their country has allowed bitcoin as a means of payment, then I'm sure it will be easy for us to find online stores that accept bitcoin.
Till date I have heard about amazon that accept bitcoin as there payment and no other online shop I have heard about. But I am sure with passage of time more and more online shopping sites will start accepting bitcoin because in the future bitcoin will be main usable currency for all the people in the world. just wait for a little more time.