Well it may be old news, but its always okay to post a disappointment here on the dis! I'll be there that same time and was disappointed to see Monsters Inc down.
Amy, you know this better than anyone - so kudos for sticking up for any newbies.

But surprise/disappoinment about HM being down in January - or any ride being down in off-season - is akin to someone going in summer and then being surprised/disappointed that it is hot. I read another thread on the WDW board today about someone who is "devastated" (their word) that a favorite ride will be down in January at MK.
MagicalMom - kudos to you for being here gathering info before your trip and not letting your surprise happen when you show up at the gate. Good luck in your planning. I am sure you will have a great trip.
Everyone out there in the newbie category - be aware - off-season trips have the benefit (usually) of lower crowds, but the drawback (usually) of closed rides and reduced entertainment. If you go into your trip with that in mind you can save yourself some disappointment down the road.
If you go to DLR frequently (at least twice a year) off-season works much better because whatever is closed the first time is usually open the next time.
If you go to DLR less frequently (once every year or two, or less), unless you really know what you are doing, put some serious thought into visiting during high season when it is most crowded. That is when Disney tries to have all rides up and all entertainment maxed out. That would be Spring Break, Summer, and Holidays.
Sorry, I will put my soap box away now....
