I got three different IP addresses when trying to resolve a domain name three times. All three of these pings happened within seconds of one another. Is this normal? I wouldn't think DNS servers could be updated so quickly, so my guess is that this is something to do with load-balancing.
So far, I've only noticed this with bestbuy.com, and I tried it because a friend was reporting that he was redirected to Best Buy Turkey, and Best Buy Korea when visiting bestbuy.com last night.
G:\>ping bestbuy.com
Pinging bestbuy.com [77.67.19.107] with 32 bytes of data:...
G:\>ping bestbuy.com
Pinging bestbuy.com [69.31.49.74] with 32 bytes of data:...
G:\>ping bestbuy.com
Pinging bestbuy.com [69.31.49.73] with 32 bytes of data:...