Power outage

The power went out at home while I was gone. I don't know when, but my machine was off when I got home. To top it all off, when I started it back up, my IP address had changed. Ever since I have had Cox, the only time my address changed was when I changed NICs. What happened this time? I didn't even get a 68.103 address -- it's in a completely different block. Oh well, it will be changing again when my DSL modem arrives from SBC. Hopefully, they'll be a lot better.