If you’re more of a Filipino Google Earth junkie instead of a Google Maps hacker, then you should visit Google Earth Philippines. This wiki, which is primarily run by Roby and Urbano over at the Philippines Makeover blog (formerly Metro Manila Makeover), aims to be a central repository of all Google Earth-related KML and KMZ files.
The most common types of KML files are those that highlight and label places in the Philippines. Probably the most interesting ones though are the one the Naga City GIS people have released. Check out the really cool Naga City building footprints. The Naga City GIS people have even released their raw Naga/Bicol data and invites Google Earth enthusiasts to play around with the data and create and share KML files.