According to the newsletter Celestia is being launched this month, first in the test realm then in the regular. Out in October, that is what it says :)
ya, I heard they had it about done two months ago but wanted to take two months to try and iron out all the programming bugs (hope they got most of them already taken care of)
Finally! It took forever for it to actually give a date but I understand that they want it to be really cool.