I have to agree with some of the comments here.
We currently use IndooGrid on a couple of portals and I think there are others we could use it on as well but I am hesitant to do so if the product isn't undergoing any further development. I don't want to get locked into using a dead module.
It's a good thing this is a great product that works well out-of-the box because the support through the forum from the developers is only average.