I have been to a few twitter presentations by so called "Twitter Experts" and I was nothing but disappointed. It seems like these experts are coming out of the wood-work because of its popularity. If you are going to attend a Twitter session, make sure you know the presenter knows their stuff so you aren't wasting your time like I have done. I have not been able to find a seminar about Twitter where I would gain more knowledge than I have.
Has anyone found a good class, book or website with advanced Twitter tips?