This question perhaps should be more along the lines of which tools which are currently on the Nope, Never, Nyet, Nada list would you like to have available in the US. Your answer would still apply. The vacuum stand is also on that list I believe. These tools have UL issues which may be too difficult to overcome.
There is also the very "unlikely" list which includes tools like the belt sander. Festool likely thinks that number of North American buyers would be too small to justify the expense of converting to NA voltage.
I want an HKC and I expect I will be able to get one by sometime in mid to late 2016 even though it is currently not available.
BTW there is a module in the classifieds.