Launchbar is the most original launcher I have ever seen. 4.0b1 brings more to us, the ability to group files, faster searching, easier configurations.

It does seem that Obdev will be charging an update for 3.x users who haven't registered before 4.0b1 was released, but really, who cares?

LaunchBar is such an amazing application. Every time I go to a computer I hit cmd-space. When an application can be integrated so well into your life, it is worth an upgrade cost.