Really depends on whether the sidebar is navigation or not. If it's extra stuff like RSS feeds and graphs (as in his example) then right is better. On the other

Really depends on whether the sidebar is navigation or not. If it's extra stuff like RSS feeds and graphs (as in his example) then right is better. On the other hand, I much prefer navigation sidebars on the left side. Why? I don't know, it just feels more comfortable that way.