Carbonation only realy happens at warmer temps, so your beer won't get any more carbonation durring the time you leave it in the fridge. I don't think that there is much flavor that would change over a few weeks at fridge temps. The critical period for bottle conditioning is how long you let it sit at room temp, that is where your carbonation comes from.
O, guid ale comes, and guid ale goes,
Guid ale gars me sell my hose,
Sell my hose, and pawn my shoon -
Guid ale keeps my heart aboon! -- Robert Burns