I just happened to stumble on a new record collection at Family Search last week! Behold, Michigan, Death Certificates, 1921-1952.
In the past couple weeks I've added 94 death records to my database. Now I'm doing some mad updating of my ancestry.com tree (it's so annoying how only Family Tree Maker can sync with their online tree). Once that's done, I plan to go back through my database and see if there are any people I've missed that should be in the new collection. A lot of names are transcribed poorly...so some extra crafty searching might be in order.
No particular breakthroughs with the new data...yet. But there are definitely clues lurking therein.