I found some nifty links about vegetarian food, Filipino food, and a vegan Filipino restaurant. Yes, it exists!
How to Cook Everything Vegetarian, by Mark Bittman. A really thorough cookbook, great if you're starting out in the veggie world, with recipes and variations by ingredient or class of ingredients.
The World's Healthiest Foods, by George Mateljan. An amazing resource of just about any ingredient you want, nutritional information, and cooking techniques to optimize nutrient bioavailability.
No Worries Cuisine, a vegan Filipino restaurant in Oakland. It's a lot of fake meat, but I'm still curious to try it.
Burnt Lumpia, a Filipino-American food/culture blog. Check out the ube gnocchi. Trippy!