Storing coffee in the refrigerator or freezer is something some purists don't like. There is a chance of coffee picking up off tastes (apparently, coffee has been suggested as a refrigerator deodorizer). Freezing can, some say, hurt the taste.
Although, I have been known to freeze coffee. I don't do it all the time, but there have been times I've tossed some into the freezer as an emergency reserve supply, for at times like when I'm snowed in and can't get out to get coffee. At those times, I'm happy to have the coffee, and don't really care about the taste being slightly altered.