There is nothing that can compare with the seminar experience. It stands out as one of the best things I have ever done for myself. That havng been said, if you can not swing it right away, I strongly recommend you spend the money to acquire the Getting Things Done Fast CD set. It is absolutely the next best thing to attending a seminar. You get a real sense of the energy and insights that the seminar delivers.
I hope you can find a way to get to the seminar. If not right now, then sometime soon.