Firefox 3 - Good PR, Poor Execution
ostatic.com
ostatic.com
Now whatever new users were drawn in by it only know that on the day they specifically hyped up as "the day to get FF 3", Mozilla failed to even keep their own servers up. That might speak well of the idea's popularity, but it certainly doesn't speak well of their planning.
In short (too late), don't throw a party if you're not equipped to handle the guests.