Help with overall theme width, twenty ten.

Is there any way with the Twenty Ten theme to expand the default 940px wide? I am trying to increase the width of the sidebar but since it reduces the width of the main content area my widgets are overlapping some of my photos from my posts.

Here is a link to a post:
http://www.livelovepasta.com/2011/07/corndogs/

Right now the sidebar width is at 260 but I need it to be 300 px wide!

Thanks for your help in advance.