Hi Gregg – on almost 3 month trip now and currently in Thailand/Malaysia. I’ve been to the Phillipines but never by boat. I would suspect you have to hook up with someone making that sailboat route – as both Thailand and the Philippines are popular sailing destinations.
I would recommend checking out some of the crew links I have here:
http://www.davestravelcorner.com/links/index.php?mwa=id:59
Specifically this one: http://www.floatplan.com/crew.htm
and or post your interest on some of the sailing forums.
Hope this helps steer in the right direction, as when I visited the Philippines earlier this year I flew the normal flight from Bangkok to Manilla.
Regards,
Dave