Andrea,
I would not wait. Rates are at the lowest point in our lifetime and bond economics dictate that they cannot go much lower. As for you options with a refi, the streamline is good if you think the value of your home may have dropped at all since purchase. With a streamline you would not need a new appraisal (if you stay with Wells Fargo). However, the rate on a streamline is slightly higher when compared to a regular FHA refi.
To give you an idea....on a streamline you could avoid all closing costs and the appraisal with a rate at 4.75% on the 30 year fixed or 3.5% on the FHA 5/1 product. This loan would be fixed for 5 years and then could only change by 1% each year afterward (Great option if you do not plan to be in the home long term).
The rate would be closer to 4.5% on a regular refi, but your loan would be subject to an appraisal. With Wells Fargo the problem you can face is that if you choose a regular refi and the appraisal comes in low, you are no longer eligible for the streamline option without an appraisal.
I work for an affiliate of Wells Fargo, please feel free to reach out with any additional questions.
Thanks,
Jason Harris