Does anyone think it is worth it to set up your site/service on EC3 with something like Scalr, so your site automatically expands to handle the load? It would

Does anyone think it is worth it to set up your site/service on EC3 with something like Scalr, so your site automatically expands to handle the load? It would take time away from adding features and delay your launch, but it may help you handle huge bursts like this. But then again, it could slow down your development enough that your competitors get the huge burst, and by the time you're ready your niche is already passe. With the ridiculously quick news cycles we have today you may only get one chance - so is the ability to capitalize on it worth the cost?