Sorry for a bit of a necropost, but figured I'd throw this in.
I used the website:
http://www.hamradiolicenseexam.com/index.html
to study for all three of the license classes. Technician is easily passable with only a few hours of study. General requires a good bit more, and extra is fairly tough. I took the Technician and General in a single sitting, and passed both. I had used the website and studied a little every week night for a month, never more than an hour a day. I basically just flipped questions while watching TV with my wife. That was plenty to do Tech and General. If you were only doing tech, it could probably be done in a week - 10 days. Of course, it all depends on how quickly you can memorize stuff.
Extra was a good bit tougher, and took about a month - 6 weeks on its own.
I also echo the sentiments of the FJ forum post regarding courtesy and helpfulness. Because the frequency space is licensed, the people that use it are usually very good stewards of the spectrum, so to speak. You really don't run into guys who just crank the power and squelch everyone out, destroying a particular frequency for others who would use it. I'm not saying it doesn't go on, but it's definitely the exception rather than the rule.