Read this article written by Vic for what we know so far:
http://lambdageneration.com/posts/after-9-years-planetphillip-has-closed-its-doors/Phillip was a good pal of mine back when I was co-hosting Podcast 17, I'm to going to try to find out what happened and if there is anything that can be done. Please post any messages you would like me to forward to him when I attempt to contact him. He was a big supporter of the modding and mapping community.
Cheers,
Thomas