[mdenny]

I'm really hoping they do, and soon, because I'm just about to hack together an action bar for my 2.1-2.3 app.

[zrgiu_]

There you go: http://developer.android.com/resources/samples/ActionBarComp...

Probably not exactly what you expected, but should do the job

[Jwsonic]

Excellent! I was waiting for them to do a developer's blog post on backwards compatibility, but this is a huge help on getting started.