I've been making good progress on the multi-select feature. In my current local build users can select multiple objects by holding down ctrl and clicking on additional objects. To remove an object from the multiple selection hold down alt and select it again. The next step is to get all of the tools working with multi-select. I currently only have the translate tool working but the rest of them won't be far behind.
I think the multi-select should be ready to be rolled out before the end of the week if all goes well.