Congratulations!!
Having made the trip from 5' 10" and 218 down to 175 between June 2010 and January 2011, I know what an arduous trek it can be. If you're anything like me, I'll bet you'll continue to slowly slide lower. I'm not really "trying" these days. Just riding more because I enjoy it more and the improving weather allows it, and I've dropped another 7# in the past 2 months.
Again, good job!!