From Kathi Reid's Ancestor Search Blog at http://ancestorsearch.blogspot.com/2008/08/family-tree-maker-2009-free-to-those.html:
If you have a copy of FTM 2008 and have not yet registered, now is the time to do so by going to Help>Register FTM. All those who registered their copy of FTM 2008 will receive FTM 2009 for free. Here is the notice I just received from the FTM team:
We’ll soon be releasing Family Tree Maker® 2009. When we do, we’ll send you an email that will tell you how to get this latest version for FREE.
We want you to have a wonderful experience with Family Tree Maker. Because you registered Family Tree Maker® 2008, we’re giving you this new version at no cost so you can enjoy all the latest additions and improvements...
You might want to look at Kathi Reid's Ancestor Search Blog. It has a number of interesting articles. Take a look at http://ancestorsearch.blogspot.com.