zillow values my house right around where i bought.
the market is always going to fluctuate. i agree with phat and say that if you can afford your payments, it doesn't make sense to walk away. i think we're going to look at refinancing again soon. we did it about 4 months after we bought and dropped our payment by about $500/month. i'm thinking we could probably drop another point and save a bit more cash, but haven't looked into it recently.