Things to do in boston while it's soggy

I'm taking a couple of vacation days to come into town, from tonight (wednesday) through saturday night. Here's what's on my agenda so far:

• NERAX (wednesday and/or thursday evening)
  
• Dinner with my grandmother (early thursday evening)
  
• Steer Roast (friday evening)
  
• Pick up MacOS X 10.4 (friday or saturday)
  
• pika 35th reunion (saturday evening)
  

Other than that, I'm just bumming around, hitting the old haunts, and so on. Anything new and must-see or must-do in the last six months? I seem to be booked for dinner, but does anyone want to meet up for lunch? (comments, email, phone, whatever)