Here's a great site for getting info on openings.

http://www.eudesign.com/chessops/ch-clear.htm

love this site and have learned alot

Hey LG. You're right that c5 is the move that black plays, although it is usually in resonse to e4, though I imagine that d3, with the expectation of playing e4 might transition into it also.

Check this out, buddy - wikipedia is our friend, haha:

http://en.wikipedia.org/wiki/Sicilian_Defence