Everything everyone said is true. Links are important. But so is content. Give Google content.
Here's why: Google looks for links to your site because it presumes if you have links, you have content. It's hard to get a good PR when you first start out, so put a lot of content Google can find.
If you buy links, try to buy them long term, because if you buy links and they come down in three months, Google dings you for that. A few good permanents links are much better than hundreds of links that go away.
Click my profile and read some of my other posts about PR if you want more info.
Good luck.
Kesey Seven
www.webelez.com