http://www.eurogamer.net/articles/digitalfoundry-geohot-ps3-update-blog-entry
A couple of things:
geohotz says he can read (write?) gameos code. Not clear exactly what access he has from the eurogamer article, but take it as you wish.
Secondly, in shitty news, a fixstars employee (the yellow dog linux people) wrote on their message board that he heard from a 'reputable source' that OtherOS will be removed from all PS3s in the next firmware update. A rumour so, but something to be mindful of if you have a PS3 fat running Linux - don't update your fw until you know it doesn't patch out access. This guy's post has been deleted since.
If it were true, though, Sony would have quite the
messaging challenge at hand. Would have to make sure no one accidentally updated their ps3 and lost a bunch of data, suing Sony about it. Although on the other hand, maybe they could remove access just for people who haven't already got a otheros up and running...to prevent 'new' users from using it just for hacking exploits or geohotz copy-cat hacking. I dunno though, whole thing's a mess if true.