Breaking: almost everybody’s first tweet was a bit awkward.
It's now possible to search Twitter's archives, using Topsy. This means you can do fun things like finding out what people's first ever tweets were - here's how:
It doesn't work with every account - some don't seem to be indexed - but you'll be able to find the first tweets for most of them. (If you want to find you own first tweets, you can also use this method.)