Here's a map of the high-resolution satellite imagery of the Philippines that's available on Google Earth as of April 2011. Areas in red have high-res coverage.
Some background-- seav made some maps like this before, but it's been a few years and I felt like seeing what the coverage looks like today.
Note, in Google Earth you can more clearly see which areas are available in high-resolution by clicking the historical imagery button.
The top 40 most populous cities and municipalities in the Philippines all have high-res coverage. The largest uncovered cities are poor Cabanatuan in Nueva Ecija (rank 44, population 259,267), Marawi in Lanao del Sur (rank 67, population 177,391), and Valencia City in Bukidnon (rank 71, population 162,745).
Also notably lacking high-res coverage are the tourist spots of Boracay and Panglao/Tagbilaran.
Still, 54.7% of the Philippines' total land area is covered, including 65.9% on the island of Luzon. That's more than half! What a glorious age we live in.