Rates are & have been at historical lows these past few months. If you're waiting to get the best rate, don't wait! Rates typically always go up a lot faster than they come down. Rates are affected by a lot of different factors; reports, global economy issues, the bond market, etc. A rate dropping any lower is always a waiting game and if taking the rates offered today still saves you a considerable amount (if you're refinancing) or makes less than $20 difference in a monthly payment, you're much better off to lock in and move forward with the transaction, paperwork & appraisal, than anxiously await something that might not happen and then regret a rate you could of had because they did move up a little.
