No there are almost no banks that are doing this the fact is that its getting done more and more so that is good but that its still not done fully sadly.
Almost no banks? You mean zero, right? The only thing banks might be interested in is the blockchain as technology. They at some point might incorporate it into their system if they think everything works well enough for them. With that I mean them remaining in full control over every aspect that banking can offer. Banks don't like the idea of a decentralized blockchain.