Nice uptime!
I found a similar case when we rewired a couple racks over the summer. One of the DNS servers had been running for about 3~4 years straight. We were afraid that it wouldn't come back up :p
I generally just use my ISP's DNS servers. I've thought about running a local cache and/or switching to a different service, though. Being as their DNS server's are in St. Louis I get pretty look-up times.
At work we run our own DNS and use AT&T as a backup.
That's how it was at my job. The AP for IT use and the guest AP were sitting about 1 ft. apart ontop of one of the server cabinets. That got changed when rewiring happend. ;)
Now to try to convince them that the employee network's range would improve if the AP was moved from behind a computer...