Thats right, one of my sites (www.newstoolkit.com) just turned PR4 and you can have your site linked for FREE on the frontpage!
All you have to do is use the NewsToolkit.com service and then you site will automatically be linked to from the NewsToolkit website... thats all there is to it. You dont even have to signup, simply use the 'anonymous' option and my site will still be able to tell who is using the service and then put a link back to your site!
This is possibly the easiest way to get a PR4 link to your site!
Basically the frontpage links are 5 sites who have sent the most visitors to NewsTookit. The more you use the service then the higher you link will climb until its within the top 5 and therefore on the frontpage