Great post llsteve80,
Hefeweizen is a southern German style of wheat beer (weissbier) made with a typical ratio of 50:50, or even higher, wheat and malted barley. A yeast is used that produces a unique phenolic flavor of banana and cloves with an often dry and tart edge, some spiciness, bubblegum or notes of apples. The "Hefe" prefix means "with yeast", hence the beers unfiltered and cloudy appearance.
I have two favorites from the states and they are: Blue Star American Wheat Beer from North Coast Brewing Co. and Pyramid Hefe Weizen; both from Cali.
By the way, us Americans popularized the use of lemon in these beers.