VisorCentral.com (http://discussion.visorcentral.com/vcforum/index.php)
- Springboard Modules (http://discussion.visorcentral.com/vcforum/forumdisplay.php?forumid=10)
-- Bluetooth? (http://discussion.visorcentral.com/vcforum/showthread.php?threadid=5159)

I hear everybody talking about it but i have no idea what it is. So, what is it?

It can be considered a wireless "Personal Area Network" within a radius of 10 metres. Check out this article on VC's own front page.
http://www.visorcentral.com/article.php3?id=20&pv=1