Its good to see Grand Rapids has its own thread now.
What I know about the UC buildings:
River House-hasn't really started construction yet, but it should soon.
JW Marriot-UC and you can check out its awesome webcam at
http://www.alticorhotel.com/index.html
Icon on Bond-first tower UC, but still in the beginning stages
Children's Hospital-I think this is just a proposal right now
Grand Rapids has a ton of develoment going on right now, but most of it is lowrise or renovations. There are three buildings of about 10 stories that are proposed too.