I'm updating my original post because the folks at Lionel have cleared things up and I don't want anyone else to be as confused about this as I was.
Lionel is actually redesigning the powerhouse 180 and it will be available later this year. Below is what I was told earlier today and what prompted me to start this conversation:
According to Angela at Lionel customer service, they are no longer offering these for sale by themselves. You can only get them now with the "GW-180" Transformer, which features a separate, physical "throttle" box and costs $200+ as opposed to the sweet $99 price tag of the PowerHouse alone.
My question is, why would they do this and what would you use to power a Legacy system with now?
- RICH