My Triathalon Training Gear Wishlist Pt. 1

1. Home Swimmer: No olympic size pool to train in? No problem. Oh, wait. I don't even have a little pool. Which leads me to #2...
   
2. Swimming Pool.

Why am I not surprised that I am attracted to the idea of creating a cheap swimming treadmill so I don't have to actually go out there and, uh, you know, swim laps? Where does this desire to run, bike, and swim in place come from?