Interstate is a sans-serif font. It goes well with Georgia, Benton Modern, Helvetica Neue, Nimbus Sans, Harriet and Copernicus. If you're thinking about using Interstate then try 42px for headers. Give 13px a shot for content.
People commonly tag it as blog, writing, book, design, photo, product, education, designer, programming and home. You can get it from Typekit and Webtype.