Now contains a matching Openbox theme based on the Emerald theme. It's not perfect, but it's certainly usable.
EDIT (AGAIN): more problems are now fixed. Please redownload.
EDIT: weakhead notified me of a few errors in the theme. I've reuploaded the tar.gz and these shortcomings should be fixed. You can see what's changed
GTK for my previous shot, renamed to 'Cappuccino' to go with the coffee theme that ~weakhead
Colors by ~ryyst
Original GTK by ~weakhead