Well it varies depending on the number of user accounts and the # of browsers that are installed. Some browsers might be detected even though they were uninstalled, because they leave a "profile" behind.
Considering that I have the latest updates for Spybot-SD (July 15, 2009), I have 10,597 in the "Global HOSTS" column and for Mozilla Firefox:
Cookies: 193
Images, Installation, &Popups: 10,596