the op, the bearman, is hibernating in his cave. he will have an unpleasant surprise when he wakes up. interesting that he has not commented since 1/27 on his position.
Maybe the Greeks will save him this week. If they mess around he might get lucky and the call goes OTM by a few pennies.
the same way the greeks are going to save the euro. the same way noob_trad3r is going to send him a GOOD check to meet his margin call.
At this point, in my estimation the initial position would require around $100K of extra margin to not be forced to sell. As stated earlier, selling OTM options, be it calls or puts, is not free money. Hopefully he sold already, but if not, it is an expensive lesson. During the 2008 and early 2009 meltdown, I sold OTM puts on some large Canadian banks never thinking I would be filled. I did get filled. I had the required margin and held long enough to break even and a little more, but was sweating in the mean time and learned that lesson the relatively easy way, thankfully. But as to the OP, selling uncovered calls is dangerous. Theoretically unlimited loss and as opposed to being straight up short, it is leveraged.