I made my initial trip to Radio Shack tody to start piecing together a setup. This particular Shack had 7 Ah SLAs for $14.99. One less thing to mail-order.

I'm trying to go barebones cheap, so I'm sticking with the Malibu outdoor light, and going with the Xenon strobe in the back. All of my night riding will be on well lit streets, so I'm more interested in just being seen. Big props to everyone in this thread for all the direction and advice. I've been off of my bike since the DST switch, so I'm really anxious to get my lighting system up and running.