Nevermind. I figured it out. It's available as beta on the dms server.
http://wiki.snom.com/RSS#Release_candidates_7.3.19_and_8.2.2_can_be_downloaded_from_snom.27s_Document_Management_System_.28DMS.29
How did you get 8.2.2 for the 370? I did not find it on the firmware wiki page...