Ok I bought some Kefir and I thought it was a drink but it is very thick, about as thick as yogurt. I'm not really sure if I should substitute Kefir for yogurt or if Kefir has some special uses that I'm not aware of. What do you guys do with it?

I put kefir in my smoothies along with some yogurt. It's good for the digestive system. Not sure what else it is good for, but I know that I only add about 1/8-1/4 cup per smoothie, otherwise, it adds a bit of a sour taste.

Info from Wikipedia.org:
This drink is prepared by inoculating cow's or goat's milk with the grains - or "beads" - of previous kefir batches. Kefir grains are a combination of bacteria and yeasts in a matrix of proteins, lipids and sugars. Lactobacillus acidophilus and Saccharomyces kefir are widely used, though the exact combination of bacteria and yeasts vary between cultures. The milk is incubated at room temperature for a day or more, during which the lactose is fermented. The resulting beverage is a sour, carbonated, slightly alcoholic drink. The consistency is similar to thin yoghurt. In fact, most commercially available American "kefir" lacks both carbonation and alcohol and is nothing more than liquid yogurt. Other places may have both alcoholic and non-alcoholic kefir.

While some drink kefir straight, many find it too sour on its own and prefer to add fruits, honey, maple syrup or other flavors or sweeteners. Frozen bananas, strawberries, blueberries or other fruits can be mixed with kefir in a blender to make a smoothie.

..Hope this helps

I just pour mine into a cup and drink it with a straw. It's like a thick yogurt-shake. I'm going to try it as a smoothie with frozen blueberries and various fruits this week, though.

I just put it on my steel cut oats as I would yogurt or soymilk. I could drink the blueberry flavor but the plain is just too sour and seems to be thicker than the blueberry I had bought.. maybe it is just my imagination.

Kefir.. really is slightly alcoholic so I am sure the American supermarket brand I am buying isn't as much a "super food" as the original. But with all the cultures and since it's nutritional value is similar to yogurt I still buy it.