WordPress 3.2 has been released.
This is a big change and it is worth doing some testing before launching straight in. The minimum supported versions of mySQL and PHP have changed, so check your service can handle it using this plugin (Health Check).
You can read more about the changes in 3.2 here.
While writing this post in 3.2 I can see straight away that everything is much more responsive. No more waiting for the link dialog to appear etc.