Rates were down but jumped up quite a bit over the last ~week because 10yr Treasuries have been all over the place - literally 4-5 huge swings up and down per day in a market that normally moves maybe 0.02 points a day. Even sub-4% is still historically low though if you're not seeing ~3% it's probably because the bank are hedging their risk against all the volatility in the Treasuries spot market. not just that they're overwhelmed.
For me a refi might save me ~$100/month. My new place is at ~3.5%, but the older one is ~4.5%. I'd benefit more from refi'ing the older place but since we're not occupying it right now I think that hurts my rate as the banks look at it as an investment property. I'll have to call my bank up and see what they can do.
