I wouldn't hold your breath on that one. There are way too many risks involved with Bitcoin to make it worth while. It doesn't help that lots of black market contributions are done through the Bitcoin system which will inevitably be investigated by governments the world around.
Since the currency is so small compared to say the US dollar or the Euro, its value can fluctuate wildly which would put a lot of risk on Sparkfun. I don't think they would recode their site to constantly monitor the value of a bitcoin and adjust their prices automatically.
Stick with your credit cards for the time being. They quite often have the best exchange rates and many of them don't charge extra for foreign transactions.