Is it really that difficult to make these fitness devices water proof? I'd be all over this if I could take it in the pool with me. I swim 4 to 5 times a week and is my main form of exercise due to back issues. I certainly like the other features of the Band, but dang it, wish it could monitor me while I swam. Even the new Fitbits just announced aren't water proof. Has anyone heard of such a device coming down the pike?