Trunk Releases

I really want the ability to have the wordpress.com like admin bar. It is in a trunk release, is there any way to keep the current released version and add the admin bar functionality to MU environment as to not loose any functionality of supported plugins?

And when 3.1 is released will it just be a upgrade and the functionality will be there?

http://core.trac.wordpress.org/changeset/15671/trunk/wp-includes
feature is frozen already, would love to add to current 3.0.1 build :slight_smile: