The Museum of Medieval Stockholm re-opens after renovation with a new exhibit on January 24th. The facilities has been closed since june 15th 2007, though a temporary exhibit has been available at Kulturhuset.
I for one intend to be there. The museum has been one of my favorites in Stockholm therefore I hope that the newly renovated facilities and the new exhibit will reinforce that impression.
There is also some information on The Museum of Medieval Stockholm blog, though in Swedish.