Several years ago I produced a DVD about Stationary Saws and I wanted to include a through explanation as to why when using any circular saw you would want to use specific blades for specific tasks. I asked Freud to give me a hand with this as I find they tend to be amongst the most innovative of all the blade manufacturers. So even though parts of this come across as an advertisement, you will find that beyond that impression there is some real basic information of how blades are made and how they work, or don't work. For more information about selecting blades for general woodworking, see the "Blade Selection" video in the Table Saw Basics video set in the index on the left.
I encourage you to not miss the last two videos in this set: how to avoid wearing out your blade cutting into those very hard surfaces of laminate flooring; and why to use a negative angle blade for pipe and other profiles particularly when using a miter saw. The Glue Line Rip blade is an example as to why you want to keep your eye on new developments rather than just doing things as you have always done them -- this blade can often eleminate the step of using a jointer prior to a glue-up.
I get a lot of comments about strange spellings on my web site, and usually it is just my mistyping, but you will find some mix of the word "specialty" and "speciality" in this section. The British and most Canadians put an extra "i" in speciality compared to the US version - so I let them both cohabit because the web knows no boundries.