You could try this, too:
Plain Yogurt (or flavored is really good, too)
Cheese Cloth

Dump the container of yogurt in the middle of 2 layers of cheese cloth. Twist it tight and hang it off of a rack in your fridge with a bowl underneath. The liquid will drain off over the next few days and you are left with something close to cream cheese that you can mix spices into.

If you use a fruit yogurt, the end product is really good for making mini-cheesecakes.