I believe that all percieved rules about wine storage change as soon as the cork comes out of the bottle (or, increasingly, when the top is unscrewed!). So any arguments are relative.
For storage of sealed wine ie. for maturation, a balance needs to be found that allows the wine to mature without it doing so too rapidly. Opinions vary between about 10C-18C (50F-64F) but within this temperature spread the results will vary enormously. At 50F, wine matures extremely slowly and I think it's fair to say that not everybody wants to wait 30-40 years for a bottle to evolve to its optimum drinking stage. At low temperatures like this, there is also a risk of tartrate crystals forming. In my opinion, this only really causes an aesthetic problem and doesn't affect the overall taste of the wine.
At 64F, the same degree of maturation may take only 10-12 years (please don't hold me to these estimates!) and some might say that the end result is a slightly lesser wine (as the slower the maturation curve, the better the end result), but as long as the environment has been constant, the wine will certainly not have cooked.
I run a climate controlled wine storage facility in Adelaide, South Australia, and the maintain our 250 cellars at a steady 59F (15C). This is a 'happy medium' as it keeps the wine well below room temperature, whilst still offering my clients the opportunity to enjoy their wines, rather than their children/grandchildren!
Aside from the actual temperature itself, it is the constancy of this temperature that is most important.
So to opened bottles. These obviously develop much faster as they are in contact with the air, hence the wine's survival is measured in days rather than years. Very few bottles are still enjoyable after more than three or four days open and out of the fridge. A recent study that I read (I forget where, sorry) suggested that storing opened wine in a refrigerator will keep it for between 6 and 16 times longer than outside the refrigerator. Indeed I found an open bottle of 2005 Clare Valley Riesling behind a lettuce in my fridge recently that must have been open for a month. It was delicious.
Since you are only looking at preserving an opened bottle for a few days until you have had a chance to finish it, I don't think there is anything wrong with keeping it in the fridge. It can take months or years for most faults to develop. If the choice is pouring half a bottle of 20 year old Coonawarra Cabernet down the sink or keeping it in the fridge, allowing a glass to warm to room temperature and enjoying it over a week, I know what I'd do!
I may have rambled a little here, but it is a subject close to my heart.
I'm keeping well out of the microwave debate though!
Cheers! Matthew