The release is ready to go for bower as of a few hours ago. Just use 1.2.x in your bower.json and it'll install the latest 1.2 release (which is this release candidate, currently).
The same goes for angular-resource, angular-cookie, angular-scenario, and the newly created angular-route. They are all versioned along side the main library, so use 1.2.x as the version for all of them.