When will 2.0 for educators be released?

I am paying out of my own pocket for a Premium wiki to use in my classroom. Now I have a separate, two-month project group that ends in April. I want their wiki work to be kept apart from my classroom (all 5th graders) but I don't want to pay for another premium wiki. Any chance I can use the 2.0 with groups very soon? I feel I need the privacy controls of the premium product. (if someone can dissuade me or show me a way to use the free product-- great!)