I don't think we're likely to allow customers to choose which partner bank holds their funds, but we do make that information transparent.
Edit: it looks like you disclosed two partner banks at http://www.simple.com/blog/Simple/partners-funding/, but I'm not sure that this is a conclusive list.
Edit: it looks like you disclosed two partner banks at http://www.simple.com/blog/Simple/partners-funding/, but I'm not sure that this is a conclusive list.