What type of loan did you do?  Was it a 30 year fixed, a 15 year fixed, or a FHA ARM loan?  What is your loan amount?  You would need a significant drop in rates to justify refinancing again.  Also, since you just refinanced and how loan amounts are calculated on streamlines you would probably have to bring whatever costs involved to the table.  The guidelines on streamlines are changing as of November 18th and they will be more difficult to get done so if you want to do it you will have to act quickly....