A guild forum/website can be of some use though. For instance, I was recently playing a riveting Versus game of Left 4 Dead with some strangers. Following the match the opposite team were impressed at my natural skill and invited me to join their clan. I told them I'd consider it and went off to kill some more zombies. Hours passed and I found myself half bored to death while simply browsing the 'net. Then the website address of the clan I was playing with earlier popped into my head and I decided to check them out. Thanks to their great, professional-looking site I was tempted into submitting an application.
But what if they never had their own website? I would have never given their little offer to join up a second thought. If you're one of those guys who doesn't like to recruit directly then simply forwarding people to a well-made website is possibly the best thing you can do to encourage them to join up. A summary of your goals and accomplishments presented in the right format will bring legions of promising new folks into your ranks.
Fellow blogger and avid WoW fan LarĂsa also recently made a claim that a guild forum is a great way to check up and see if your guild is 'healthy'. She argues that a decline in activity on a forum is a very negative thing and should be treated quickly. While the post admits that many guilds function well without a forum, it's silly for a raiding guild not to have one. On the contrary, I believe that with the advent of in-game tools such as the Guild Calendar, guilds can run pretty smoothly without having to talk things through constantly via a forum. If you think discussing strategies is a necessity, then set aside an evening to talk things through with your raiders on /g or on Ventrillo. Granted, having a forum does make things run a lot smoother and can reflect the social atmosphere of your guild quite well. Conversely, I've known many guilds that have progressed straight through Ulduar and beyond without a piece of external communication (aside from TeamSpeak) between them.
Yep, forums can serve as another useful platform for people to bond. Who doesn't like looking at the real life pictures of people you play with, especially if they're hot? Websites have always proved to be a useful recruitment tool too and they let you brandish your guild's achievements at people passing by. Just remember the other side of the argument: Forums are also another way for drama to spawn and must be moderated fairly frequently. In addition, why are people posting on a forum when THEY COULD BE FARMING FOR FLASK MATS FFFFFFFF!!!?!??!?!!?!
In summary:
This isn't 2004. You don't necessarily need a forum to co-ordinate your guild effort any more.
However, they can be a great, subtle recruiting tool and they easily let you see if people are getting along well.
Moderation is key in many ways. Make sure no one is stirring crap and causing drama and ensure that people spend more time actually in the game.