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!"
* 18.104.22.168 * 22.214.171.124
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."
* 126.96.36.199 * 188.8.131.52
vnsc-pri.sys.gtei.net (no idea who or what this is; but their DNS sure is open):
I take it Gmail has given out a bunch more invites in addition to the initial 5 or so they gave out with each new sign-up? Is that a sign of desperation, or a (late) response to how hot these things were a few months ago?