Below is the email I just got. Hopefully this isn't just a 3 month thing, it'd be cool if it was part of the $19 combo or something like that.
We've teamed up with our friends at Google to give you access to Google Play Music free for 3 months. With Google Play Music you can upload your music library, and listen to over 25 million more songs, ad-free. Plus, you can now use your 2degrees account to purchase music, movies, apps, games, books and more from Google Play. If you have any questions on Google Play, check out our FAQ's. The Team at 2degrees
Edit: So it appears the deal isn't as great as it appears to be. It seems to simply be a 3 month free trial. There doesn't appear to be any discounts after that. Disappointing.