This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Tankless will certainly be an energy savings -- not enough to pay back the investment over any reasonable amount of time. But my piece of mind is worth much to me, and I no longer want a tank of water in the house.
And yes, we're not a big fan of carpet and have been slowly replacing it over time.