First lines are important. Reading that sentence makes you ask--why? Right? And you read on to learn the answer. That is the answer--because they create an initial reaction from your reader. Your first line will tell your reader what type of person your narrator is, or it might entice them to read on to get an answer. Whatever reaction your first line gets, it needs to make the reader want more.
Hop over to their blog for the contest rules, and a peek at some GREAT first lines!