Vawncast flyer program?
 

Has anyone heard about this? I was invited to a function this past weekend and the person who told me about it said it covers most of north america and asia. I may have heard wrong though...

Welcome to FlyerTalk!

Since your post is the only thing that shows up on Google for that word (nicely done, BTW) and I've never heard of anything that sounds like that, I'm guessing that you misheard.

There is farecast.com that aims to help predict fares, but they aren't a loyalty program.