I thoroughly recommend this simple recipe:
http://www.cookingforengineers.com/recipe/195/Chocolate-TrufflesI mean, 2 ingredients and thats about it (unless you add cocoa powder dusting etc), and they really are quite nice.
Im wanting to make some more but want to make them a bit fancier...maybe mix different things in. All I can think of is chilli chocolate truffles...but any suggestions on what else I could use? Strawberry essence etc?