Support for more than two tag and/or recently assigned windows
I have dual monitors at home (and 4 screens at work) and would like to be able to more than two tag windows. I have lots of extra screen space, and having as many tags as possible displayed at once would save a lot of mouse navigation. Ideally would be able to have, for example, People, Places, Events, Categories, Keywords visible at the same time. Seems like you could do what you have now with Tag Window #2, but have the option to continue spawning additional windows, rather than having a maximum.
Along the same lines, multiple Recently Added windows where you can have different types of tags showing would be a nice addition.
The more I can maximize use of available screen space, the faster the tagging process can go.