We've done a half-dozen smaller sites in wordpress and I've flirted with the idea using wordpress for our primary site (www) but we've never gotten to actual implementation.
Gerald's observation in this thread is a good one -- drupal started with the goal of being a comprehensive CMS and has worked it's way down the food chain, wordpress the reverse. However, I think the developer community around wordpress have decreased the pain point in wp playing as a grownup substantially. We started using wp because the back-end is surprisingly friendly for the average user. I always found an extra layer of abstraction in drupal that made simple things not straightforward and I always found my mental model expecting something slightly different than what drupal delivered. Admittedly, that was usually because I was trying to do something simple and dirty and drupal was the over-powered tool for the simple task (oh, but what an awesome tool at the end of the day). Drupal also generally struck me as something made by developers for developers, wordpress seemed to err on the side of users & designers. I know that the next major rev of Drupal will be going through a major overhaul of the back-end, I'm looking forward to the improvements. I think both systems have incredibly rich user communities surrounding them and more often than not, we can find a plugin that's close to some sort of functionality that we need / want and we can modify from there. Even luckier, there's a rich developer community for wordpress around Denver and we know the original developer (Matt) so we have something of a fallback position if we got really serious and got stuck along the way. I think drupal's being used for the larger sites that I know of (IMA redesign, Balboa Park Collaborative, to name a few) and I think your choice depends on familiarity, scope of project, and programming skills. -bw. -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Bruce Wyman, Director of Technology Denver Art Museum / 100 W 14th Ave. Pkwy, Denver, CO 80204 office: 720.913.0159 / fax: 720.913.0002 <bwyman at denverartmuseum.org>