Errr.. But theres no sourse to download neh .. i mean sumthing like a ;download' button or something ? 
u missed this part 
Open iTunes to buy and download apps. 
Instructions
Things You'll Need:
Computer
iPod touch
iTunes
iPod USB cable
iTunes store account
1 . Download the latest version of iTunes and the iPod Touch 2.0 Update (see Resources) if you do not have them already.
2.Go to the iTunes Store, click on the "App Store" button in the navigation menu and find an application you would like to install on your iPod Touch. The App Store includes both free and paid applications.
3.Click "Get App" and enter your iTunes Store account information. The application will begin downloading immediately.
4.Plug your iPod Touch into your computer using the iPod USB cable to begin the syncing process.
5.Click on the "Applications" tab in the iPod menu, which will come up automatically after your iPod Touch has been connected to your computer.
6.Check the "Sync Applications" and "All Applications" buttons and then hit the "Apply" button to transfer applications to the iPod Touch. Once the sync process is complete and the iPod Touch is ejected, the applications can be run on the iPod Touch.
