removing the category sidebar from my template.

Here is my webiste.
http://www.iamipad.com

im using the arclite theme.

I would like to delete/remove the left column of the home page where it says archives and meta under that.. Then i would like to move the main content(Introducing the Apple iPad)to the left of the page and add a column on the right for ads.

Please let me know what page i need to edit and what code to add..

Thanks, John