Is it possible to have two sidebars simultaneously?

Hey! I’d like to remove the main menu from my website’s header and move it to the left, so it turns in a sidebar which would ve visible in every page. Additionally, I’d like to have a right sidebar that appears in the blog page only (and in each of its entries), so there would be a left sidebar – content – right sidebar layout in it.

Is this possible in a kind of simple way? How?

The page I need help with: [log in to see the link]