The GitHub guys are just iterating and growing so fast. I'd hate to be SourceForge right about now (it seems to have caused the SF.net folks to wake up, though, as they've begun to improve at a very rapid clip).
I ordinarily recommend folks not go the installable application route (even though our business is all installable based) if they can avoid it, but I think it definitely makes sense for GitHub. It's an area where the prices are very high, and the products are generally pretty bad.
SF woke up a bit around the time Google Code project hosting was released. But with GitHub and BitBucket kicking things up a notch, it's definitely a bad time to be SF. And despite all their changes, it still feels like a pain to use SF.net.
I ordinarily recommend folks not go the installable application route (even though our business is all installable based) if they can avoid it, but I think it definitely makes sense for GitHub. It's an area where the prices are very high, and the products are generally pretty bad.