Implementing Time in Web 2.0

Sean McGrath has an interesting column on ITworld this week in which he muses on dishing out Web content not based on what's new to the site that minute, but on what's new to the individual consumer of that content since his last visit. One suggestion he has for getting around the limits of 'RSS/Atom feeds that only hold a finite amount of history' is to adopt a naming convention that includes YYYY/MM/DD/HH/MM. The tradeoff, of course, is that your 'website just gets bigger and bigger.'