[micro-ram]

This is why I use OpenDNS. You can update THEIR cache. Once I make a change and update their cache, I test again. If all is good, I know the work is done and move on knowing the rest of the world will catch up.

http://opendns.com/support/cache

[dsl]

Even if you don't use OpenDNS, it's a great URL to keep bookmarked if you are a site owner. Instantly propagate DNS changes to a few percent of the internet with no worries.