I have a device that I use exclusively for streaming, so I've set it up to use my ISP's DNS. My DHCP server is set to give out OpenDNS' address, so everything else gets good DNS service and my streaming doesn't get hit.
Alternatively, you could probably write a script to bounce back and forth. It would be pretty trivial in Linux; I'm not sure how it would work with OS X (ironically, my OS of choice :) or Windows.
