Welcome.
Nothing is official; the last thing I heard that was semi-official was that it was to be released in January, 2006, and that wasn't technically official, just a rumor that was said to be official--of course if its only rumored to be official that doesn't really work, now does it?
What I can tell you is that Netflix began listing the remaining seasons as "Coming Soon" discs about six months ago and they generally only do that if a disc's release is imminent. Of course, six months is already longer than imminent so read into that what you will. But by all means buy the first season anyway!