New Yahoo! Sync Framework in OS X 10.4.10

Any time I install a major system update I always do a system-wide diff to see what files have been added / removed. This afternoon I installed the 10.4.10 update for OS X and saw that a new framework called YahooSync has been quietly added. Want to see for yourself? Go to this folder...

/System/Library/PrivateFrameworks/YahooSync.framework/

What's Apple up to? Could this be prepping things for the iPhone?