Vietnam
Chances are, if you take a bus to Dalat, they'll be waiting for you when you get off. These guys, recommended in Lonely Planet amongst other places, are English-speaking tour guides with their own motorbikes, who will take you on a day tour of Dalat, or if you're feeling more adventurous, up the Ho Chi Minh Trail through the Central Highlands, to Hoi An or further afield.
Real professionals who really know their stuff. They can show you a side of Vietnam you might not be able to see otherwise.
Try to find the genuine Easy Riders, as there are many impersonators.
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