be careful on appraisal
Your house may be appraised much lower than one year ago, and then the bank will force you to pay down loan amount
If you want to do a refinance, DO ASK the bank to pay appraisal fee, so you can walk away without a loss if appraisal comes low. See a post:
"Eliminate appraisal fees in refinance or purchase loans" http://www..com/article_t/Living/31767381.html