Not a bad idea, but can a browser actually be profitable? There would have to be mobile ads or another way to monetize a mobile browser. Facebook, like e-mail and twitter, is a communication platform that hasn't figured out a strong way to monetize, which may actually be more difficult for web companies than it seems. Just because something is popular because its free doesn't mean it will be popular if people have to pay a dollar to use it. I suspect that Facebook will need to re-incarnate itself into a profitable business through acquisitions, perhaps like Berkshire Hathaway.
There have been quite a few VC partners "leaving" to start their own Angel funds. It wouldn't surprise me if these "new angels" are acting as the scouts and partially funded by their old firms. I would think these Angels would disclose their past relationships with certain VC funds, in fact it might be a selling point, because the startup will know they have a strong chance of getting a series A with their new VC friends.
I'm not sure if this is that surprising. Don't most Angels have established prior relationships with a lot of VC firms when they were launching their own startups? It wouldn't surprise me if certain Angels gave favorite VC firms lead gens for future investment rounds.
@sarahlacy I thought I saw something about the Winklevii giving Zuck their original code from their prototype dating site before Zuck launched thefacebook. There are also a few founders who aren't technical programmers like in pinterest. Besides the jury is still out on the success of the facebook business model.