We base our entire business around making GitHub an awesome place to work with code. Our users, our revenue, our reputation is all centered around this. There's really no future in which we would move away from that.
In terms of exporting your data: we have a fully featured api (http://develop.github.com) in addition to features like our Wikis which preserve all history and content in a git repository you can clone down. We'll always try and make this better, but you should be able to export any data you wish right now.
Absolutely! I really didn't mean the post to be anything remotely disparaging of GitHub. More of a skepticism of any central place with as much steam as GH has. The original article on this post just emphasizes this -- the guy is hesitant to contribute to projects that aren't on GitHub. When a majority of people feel that way, we're somewhat at the mercy of our benevolent dictators.
Note: I'm a paying and satisfied customer of GitHub!
I hate sourceforge with a passion because the experience is so bad. In many ways, GitHub's success is sourceforge's failure. If GitHub starts to suck (doesnt look like it will any time soon) then we'll all shift to the NBT in networked source control.
In terms of exporting your data: we have a fully featured api (http://develop.github.com) in addition to features like our Wikis which preserve all history and content in a git repository you can clone down. We'll always try and make this better, but you should be able to export any data you wish right now.