Have you heard of Macitt? It is a Digg-like site that concentrates on Apple news only, none of that wacky Linux stuff or distasteful Windows tips to clutter up the site. Our friends at Macitt let us know that they are giving away a MacBook this month, and all you have to do is participate on the site. 3 stories, 3 comments, and 3 Macitts is your formula for getting a new MacBook (or at least being entered into the contest). The contest ends June 30th, so get Macitting while the getting is good.
Don't forget that TUAW is a great source for submissions to a variety of social news sites. I'm just saying.