I’ve posted about being hot one second, and then not for the rest of eternity, and just want to dredge up this example again:

slowly dropping until irrelevant.

Just a lesson – just because something is cool/hot for a while doesn’t mean you’ve built anything sustainable/long-lasting. Frappr was cool, and spread like fire, but once people realized that it wasn’t really useful, they dropped it.

A burst of activity is good, but you really need to take a long hard look on why your website will be popular 18 months from today.