Honestly when Litecoins came out I thought they were something that would blow over in a matter of weeks. They seem to be holding strong, though. Would it be wise (I have a decent number of bitcoins) to convert a small portion of them to LTC? If it helps, I am "in it for the long run".
Keep a careful eye on BTC/LTC exchange rates - it's gone through some interesting fluctuations recently. Your optimum LTC buy window might come when miners switch back to BTC...