A case of good design and usability

I was just signing up for http://www.rememberthemilk.com/ (online todo list) when i noticed this: Instead of asking the user which date format to use, where they live or something else, they ask a simple question to determine a preference that sometimes is made too complicated. I haven't got any good examples of other online apps that have asked the same question, but just consider the options you have in Windows (if you can find them that is...to change the data format you need to look in Regional and Language Options - not in Date and Time which would have made mode sense): I know this is the Customize Regional Options and therefor not a great comparison, but it's still interesting to see how simple complex things can be made... Update: apparently images in an email to blogger isn't working all too well..images added