Single Guy Money

I was reading the Fatwallet forums and someone asked a very interesting question. The poster was single and wanted to know what would happen to his money when he died if he had not provided the login info to his next of kin and there was no beneficiary.

I have never really bothered to put much thought into this because I do not have a spouse or children but that question now has me thinking. Where would my money go? Would the state take it? Would it just sit in the bank? I would much rather have it go to my family than get taken away by some unknown authority.

I know that for my 401k account, my mother and sister are the beneficiaries. But what about accounts like ING where they do not ask for this information?

I do not have a will because I don't have significant assets and I don't have any dependents. Should I have a will?