When you are ready to plant your tomato starts, remove the lowermost four branches of the plant. Dig a hole deep enough to cover the areas where the removed branches were. The small nodes leftover from where the removed branches were will become roots, and planting it deep in the soil will encourage root growth. This technique will also make your fully grown staked tomatoes look neat and less bushy.
Here is a great article about how to prune and care for tomatoes that goes into much more detail: http://www.finegardening.com/how-to/articles/pruning-tomatoes.aspx
Pictured below are the tomato plants Wild Boar Farms gave to us. We can't wait to taste them! Check out their website: http://www.wildboarfarms.com/index_1.html, and see our earlier blog post to learn more about them and the tomato plants they so generously donated!