Well, it looks like Mac OS X 10.4.7 enables the two-fingered right-click on MacBook Pro models, bringing them up to feature-spec with the MacBook. Rock on.
Go into the trackpad preferences inside System Preferences to enable the "tap trackpad using two fingers for secondary click" to enable the functionality.
[robg adds: Yes, this is a standard feature that's part of the upgrade. However, the two-finger right-click is so popular on the MacBooks, I figured it couldn't hurt to help spread the word that the MacBook Pros now have it as well.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20060627210830917