Likely many online stores accepting bitcoin will hault the payment option.
Not really. If you sell bitcoins instantly after getting paid and adjust daily, bitcoin price doesn't affect you. The only ones that are worried now are those who kept money on gox and they are dragging the price down.
I would think that with the daily price fluctuating so much it is too high of risk for online stores to accept bitcoin. Prices would have to adjust with the ticker price of the bitcoin market for it to be safe.
They do that.