This evening, I ran 4 water lines... in 30 minutes. PEX tubing is a dream come true.
Our new PEX Manifolds are installed but not connected to the system, so I've started running 1/2 inch lines off of them to the various parts of the house. I ran two lines for the downstairs bathroom (hot and cold), then pulled two more for the kitchen.

I also was able to lay out some 2 inch PVC drain pipe that will drain the washing machine upstairs. Lots more pipe is needed to get the drain to the main stack and to build the venting system.

We'll have to head to the home center tonight for various PVC and PEX goodies. We spent $150 yesterday on this stuff, and it'll probably be another $100 tonight. :P