For Research In Motion Ltd. – a company whose stock price hasn’t been this low since the winter of 2003 – Facebook entering the smartphone market might just be a good thing.

Sure, the odds of Facebook actually acquiring the BlackBerry-maker as part of its reported move into the hardware business are very slim. But unlike the revolving door of tech giants that were rumoured to be interested in RIM over the past couple of years, Facebook as a buyer actually makes a little bit of sense.