The moment you have been waiting for has arrived. Ghost Adventures: The Series premieres tonight at 9pm Central/10pm Eastern on the Travel Channel. They will be investigating Bobby Mackey's Music World. If that's not enough to fulfill your GA needs, they will be hosting a LIVE webcam chat after the premiere on TravelChannel.com at 11pm Eastern and they launched their new website at www.ghostadventurescrew.com complete with bios, forums, merchandise, etc.
Zak Bagans and Nick Groff gained increased popularity when their documentary aired on the Sci-Fi channel. If you haven't seen it yet, don't worry. Travel Channel has acquired it and it will be airing sometime in the future. I had the pleasure of watching the film when it first premiered.
Edit: After watching the premiere tonight, I'm starting to rethink how I feel about their investigation style. During paranormal investigators have different investigating styles. Groups like TAPS focus more on science and debunk than anything else. Groups like GA are more emotional with a little science mixed in. Not exactly a bad thing. Personally, I prefer the scientific types. As long as GA are on the up and up about everything, I think it's good that people get to see the other side.