OK - you are in that line of work, so here goes. Fred linked you to the Michigan Beer Guide, which is something to bookmark.
Kuhnhenn and Dragonmead in Warren, Big Rock in Birmingham. Ann Arbor has 5 brewpubs + the Corner Brewery in Ypsi. OG in Milan is making some really clean and balanced beers - the 440 pepper smoker is one that is a little out of the box.
I-94 has breweries from Ann Arbor to the State line. Local Pub and Brewery in Jackson, Arcadia in Battle Creek, Bells, Paw Paw in Paw Paw, Livery in Benton Harbor and Greenbush in Sawyer (exit 12).
If you are heading up along Lake MI, there is Saugatuck in Douglas and Odd Side in Grand Haven.
In Sparta, there is Michgan Beer Cellar, making some really tasty IPA's. The British IPA is based on the owners NHC gold medal winner from a few years back.
Fred covered Grand Rapids, but I hear good things about Hideout Brewery.
Michigan Brewing is in Weberville, they make the Celis line up these days.
Redwood Lodge on the south side of Flint has won many GABF medals and has been Small Brewpub of the year. The brewer that won those is no longer there of late, so I can't say if the beers are still as good.
Edit - you should be able to find some Shorts in a good beer bar or at a party store (as liquor stores are called here).
Edit #2 - Dark Horse in Marshall. Great taproom with an "up North feel to it".