If you're growing amaryllis in a pot, they like to be a little crowded.  Plant one large bulb (or 2 smaller ones) in a pot with an inch or two of space all around the bulb.  I've got some planted in pots 6"-8" wide and about 6" tall.  Different types take different amounts of time to bloom, so you may not get blooms for Christmas.  I have heard that they can be tricky to get to rebloom when you're growing them indoors.  And I don't think you needed to keep them in the fridge.  If you need to store them, I think they would be ok at room temperature.  (But don't take my word on that...I'm no expert!)  Everything I've read about getting potted indoor plants to rebloom says after the leaves start to yellow & die back, you should cut them off and store the whole pot in a dark cool place (like a closet).  Some sites say to tip the pot on it's side.  I don't know what that's supposed to do.  I know they don't like to be disturbed, so when you're transerring them from a pot to the garden (or vice versa) they may not flower the following year. 

If you're going to try to pot these, I'd put each bulb in a small-isb pot in a sunny window.  You might even want to mix some bone meal in with the potting soil.  Good luck with this.  I've got a bunch I planted in my garden last fall that didn't bloom this year.  I'm hoping if I don't disturb them, they'll bloom in the spring!

--Sharry