Greetings from developmentland!
The Grim Dawn original soundtrack is now ready to download from Humble Store for everyone with the $35 or higher reward tier (excluding the $48 co-op expansion bundle, which doesn't include it).
For more details and how to resend your Humble Store link, check out the forum post: http://www.grimdawn.com/forums/showthread.php?p=145999#post145999
News about Act 2 release coming later this week.
We hope you enjoy!