Many commenters on our Mac OS X 10.4.7 Update
post have noticed that two finger right-clicking has been enabled on 15" MacBook Pros. It seems to work just fine on mine, and this update should evoke a sigh of relief to all those using the trackpad hack
we blogged to accomplish the same thing since the hack has annoying side effects, such as needing to be re-enabled after each restart.
As a side note: it seems a little strange that this wasn't documented; I scanned the extended release notes
on the 10.4.7 update and didn't see this anywhere.