I have a subscription with tourguidemike.com as well. Bought it months ago, I leave for DisneyWorld in 5 days, and I'm surprised at how little I actually used the Vacation Planner from tourguidemike.
Keep in mind that Mike, who created the website, use to be a tourguide for DisneyWorld. That's where his expertise is, and the only thing you're really paying for. All the other information he gives, you can view on other websites for free.
If you have no idea what parks to visit on certain days, or don't know where the best view is for fireworks in Magic Kingdom and Epcot, then I'd say buy the vacation planner.
If you don't know what PS arragements are, or need other basic information simular to that, then visit these websites:
www.wdwig.com
disboards (You already know!)
www.disneyworld.com
www.mousesavers.com (One of my favorites! Lets you know when Disney comes out with discounted packages, or hotel discounts.)
www.ticketmania.com (sells discounted DisneyWorld theme park tickets)
Hope this helps,
Diznee25