Here's a question that's been running through my head ever since Michael posted about FriendFeed being in danger of becoming the coolest app no one uses : exactly how many startups out there are trying to be the one social networking service aggregator to rule them all, and how many is enough? It seems like every day startups come up with new applications, be it for desktop, Web and/or mobile phone, that essentially want to be the gateway to our online lives. In reality though, there are not that many people who want - let alone need - continuous access to multiple social networking services, and even if they do, how many people (outside of the tech industry) do you know who are genuinely waiting for a extra third-party that helps them manage all their online personas?