10.4.10 is out! It now offers better Bluetooth support, RAW image handling improvements, control-Eject… <yawn>. What an understatement! As with all point releases Apple quietly sets the stage for the next act. The iPhone. So with that, there is a new app in town to help out with syncing your contacts to your iPhone, Yahoo! Sync

So for those who like spelunking start with:
/System/Library/PrivateFrameworks/YahooSync.framework

And yes, there will be a Windows version too. Check the strings…