It looks like LEGO is working on a plan to make more of the wildly popular LEGO Ideas Research Institute (21110) set. Over on [email protected], they have updated the status to say:
LEGO® Ideas sets are fan created and limited production. We’re sorry it’s not available – it’s proven to be an overwhelmingly popular set. We’re looking into if we can make more. Check back soon!
From the looks of it, LEGO is trying to get more of the sets produced as the demand was definitely there and it was underestimated on how popular it actually was. Currently, the Research Institute is only available at various LEGO Stores with very limited quantities coming in from time to time. It is also on the secondary market but the price is at least three times the markup so I would suggest holding off purchasing it as there may be more coming out in the future.
Thanks to Dennis for the heads up.