Open source software has gained a lot of momentum recently, most notably because of its low cost, flexibility, and large, collaborative support network. Even the U.S. federal government has gotten into the pool to swim, using the Drupal Content Mangement System (CMS) for their site at www.whitehouse.gov. But with all the great benefits of open source, there are still a few points to keep in mind when choosing an open source solution for yourself or a client of yours.