Internet banks: FDIC insured doesn't mean much -- if you have to go through the process of recovering assets lost under this procedure, you will spend way more than the difference in interest. I have investigated internet banks and don't see the point of checking accounts with them because I keep liquid surplus cash (such as pre saved tuition for private school) in CDs. I want faster access to my spendy cash so I have no use for them. All I have got on the subject, although I am investigating a few claims against a particular bank for making a person jump through so many hoops to get his money out and account closed, that he missed out on a business deal and suffered damages as a result.

Comingling of assets: My .02 is that it is waaaaaay too early to do this as given your ages you probably each have substantial seperate estates and your marriage is new. You should each seek independant legal advise on this decision, in my not so humble opinion not to be taken as legal advise.