The Lake Union Boats Afloat show tickets went on sale today and the web site launched. The seminars aren't posted yet but the Exhibitors list is there (although not working well due to a page layout issue).
The Lake Union show is good to crawl around mostly new power boats and sailboats. There are occasionally a few used boats onsite but the brokers have their pictures posted of their full inventory and you can talk to the brokers as well. I would say that if you're in the market for a used boat, go down and talk to the brokers and use it as a networking opportunity.
As for the exhibitors its mostly systems, insurance and boat loans. Not much for sale on site to take away (compared to the bigger Seattle Boat Show), but a good chance to talk to manufacturers about their gear as well as prices.
I'm waiting to hear more about the seminars before I make my plans, but I'll definitely head down to talk to a view vendors.