i've been reviewing the map of my home province and it seems only the town centers of Famy and Sta Maria are not mapped. all the others are present thanks now to Bing that provided hi-res imagery. Sta. maria needs lots of clean ups too but there's no Bing imagery there as well as Siniloan and Famy.
I've been to Sta Maria twice. the second time i tried to find the alleged old stone church there only to be dismayed at a new structure, so much for false reports or outdated online info.
i'll start looking for other Laguna locals to help in making Laguna the most mapped province of OSM PH :P