ScrubIT (filters pr0n, so probably not what you want): "ScrubIT offers clean, reliable, and speedy DNS service FREE of charge. Our filtered DNS scrubs out the bad stuff and is absolutely simple to setup and use. Try it today!"
* 22.214.171.124 * 126.96.36.199
OpenDNS (you'll get ads on DNS misses): "Taking a few minutes to unbundle your DNS service from your ISP's Internet connection means a safer, faster, smarter and more reliable Internet experience for everyone in your household."
* 188.8.131.52 * 184.108.40.206
vnsc-pri.sys.gtei.net (no idea who or what this is; but their DNS sure is open):
Yeah I think ultimately it's going to involve simply selecting individual songs (or as many as I can select at once, provided the info I'm changing is the same for all of them) and changing the info. Which means it just won't get done. Oh well.