Open new 360 Performance Savings account and then transfer your full balance -it takes less than 5 minutes online!
I just did that a couple weeks ago after coming across this same info on a Facebook group. Capitol One changes the types of accounts they offer, and doesn't tell account holders that it has happened, but they're happy to let people sit there with their old accounts earning next to nothing.
I felt a little sheepish at having not noticed, but I (and you) are not alone - there were a bunch of people on that facebook group sitting on old 0.30% Capitol One savings or money market accounts, many of whom came over from ING.