Last night, Google rolled out Gmail Labs. This is your opportunity to help Google improve Gmail. (I knew there was a reason Gmail was still in beta.)
Google employees have a nifty benefit called 20% time. This means they get to spend roughly one day a week working on whatever technology idea they want. In some cases, these ideas turn into businesses on their own. In most cases, these ideas go to Google Labs, or now, Gmail Labs.
When you log into your Gmail account, go to the Settings option. There is a new Labs tab in the Settings box where you can choose from 13 different Labs options, with more to come. Labs are ideas in the experimental stages. They might work, they might break, but they are there for you to test. Popular labs may go on to become features; other Labs might just be bad ideas.