The great thing about the rustic furniture trend is that you can take something kind of rough-hewn, and it's suddenly fashionable. Have you seen the Restoration Hardware catalog recently? People will pay a lot of money for wood furniture that looks like it was salvaged from somebody's attic. People will pay even more if the furniture looks like it was taken from a barn.
I'm not making fun of people who buy distressed furniture. If I were, I would be making fun of myself. The centerpiece of my own living/dining room is a pretty rough-looking reclaimed barnwood dining table. It's a big solid table that seats 8, which I bought from Modern Rust, a small company run by two carpenters somewhere near Washington D.C. Sometimes I get annoyed that my table is a little bit warped and the base of it is uneven, and the top has these cracks that crumbs get stuck in. But you know what? It's a great table. It has character, and nobody else in the neighborhood has the same one.
The fact that my table looks like someone went out in a barn and hammered it together makes my living/dining room look cool. You can make your house (or patio, or office) look cool by building yourself a table made of scrap lumber. If you don't have scrap lumber, some of the following tables can be made with cheap boards from your local home improvement store.