You can apply for the company's Prototype Program now, although we'll be honest: the chances are slim that you'll get in. Twitter only plans to invite roughly 2,000 English and Japanese speakers at this stage, and there's only mention of supporting iOS so far. The one consolation is that those users can share their experiences. If Twitter starts tinkering with a major change, you'll know what it looks like before it reaches the regular app.

It's not going to see widespread adoption, then, but it could still be significant. Twitter frequently talks about making major changes, but there's rarely much official interaction with the public before the features reach the beta test stage -- that is, when they're nearly ready. The Twttr app could give the public more input into these changes and offer more insight into Twitter's thinking.