Hey Friends!
Google Adsense programme now allows placing up to three link units on a page.

Here is the e-mail I recieved from adsense team.

Subject : [Inside AdSense] Policy updates!
After our many weeks of policy posts on Thursdays, you're probably intimately familiar with all of our program policies. So we can imagine your surprise when you woke up today, got your morning coffee, and settled in for your daily re-read of the policies -- only to find they were different! To help lessen the shock, we've highlighted the two notable changes below:

We're now requiring AdSense publishers to comply with the spirit of our Page Quality Guidelines. If you're an AdWords advertiser, you might already be familiar with these guidelines, which are intended to provide a better experience for users, advertisers, and publishers alike. If you use any kind of online advertising, know that these guidelines encourage publishers to, among other things, create sites with simple navigation and substantial, useful content.

This new policy requirement doesn't mean that you can't use online advertising; it simply means that if you do, you need to be sure that the way you advertise meets with the guidelines, whether it's through AdWords or through any other advertising program. However you advertise your site, it can always benefit from significant and relevant content, clear navigation, and the other points in our quality guidelines.

The other noteworthy update: now you can place up to three link units on a page. As we've noted in the past, link units are a great way to provide relevant, user-friendly ads in hard-to-fit locations on your site. With the new opportunity to place three link units -- and the plethora of link unit formats -- we hope you'll find great ways of incorporating this unique ad format on your site.
Posted by Julie Beckmann - AdSense Publisher Support