I was thinking of taking my blow dryer and flat iron to Thailand. Are the outlets in Thailand friendly or would I need to take an outlet converter?
It depends where in Thailand.
In Phuket there wasn't the cool double style outlet, and I needed an adapter.
Also the voltage is 220 everywhere. Laptop chargers, like the one for the Mac, can handle both which is great.
But not all appliances may work well with the change.
The following to resources describe the situation pretty well.
We just got back from Vietnam and it was hit and miss on whether a hotel had our outlets or more European outlets. just to be safe, I would get a converter. We found one for about $40, that has 5 "fronts" and one back-so you attach the converter that works. it was from Brookstone.
I brought a convertor for my trip to Southeast Asia and didn't need it once as their outlets were north american friendly :)
yes they are universal according to the international standards