When we taught you the first Google Wave search you should know (
with:public), Wave automatically added public waves you read to your inbox, and an empty inbox quickly became hard to come by. Today, Wave fixes that with a handy Follow/Unfollow button.
Now, rather than automatically adding a public wave to your inbox as soon as you look at it, you have to explicitly choose to follow public waves.
Here's how following works: When someone adds you directly to a wave, or if you contribute to a wave, you will automatically be following that wave. When you see a public wave that you would like to get updates on, you can chose to follow it by hitting the follow button in the wave panel toolbar. You can remove these waves from your inbox by hitting the "archive" button, but when there is an update they will pop back in. You can switch between following and unfollowing a wave as much and as often as you like.
As old public waves you were automatically added to update, they'll start disappearing from your inbox unless you go back in and explicitly follow them. Keep in mind that Unfollow has replaced Mute, so you can also Unfollow waves you've started or been explicitly added to if you no longer want to receive updates in your Inbox.
We realise many of you are still waiting on invites (we'll continue to do our best to hand some out every week), but trust us when we say this is a nice update.
Follow your waves [Google Wave Blog]