Update: Here's the official changelog.
● More fixes for sending/receiving MMS
● Fixed a bug that prevented some from sending SMS longer than 160 characters
The latest version of Google Hangouts for Android, 2.0.303, has begun rolling out to handsets this morning. This new version doesn't appear to bring much in the way of changes; the only thing we've spotted so far has been a new option to enable or disable sending of usage statistics to Google to improve the app.