I made butter chicken (Chicken Tikka) last night for dinner using this stuff: (you need to scroll down to get to the butter chicken paste)
http://www.kitchensofindia.com/product_menu_curry.asp
Very tasty. Could have used a bit of cream, but good otherwise.
Hee hee. The ad at the top of this page (sulekha.com) I guess figured out that you said chicken. It says something like "thousands of delicious non-vegetarian delecacies"