Merry Christmas!
God Jul!
Joyeux Noël!
Gleðileg jól!
Καλά Χριστούγεννα!
メリークリスマス！
Glædelig jul!
...and same in all those many languages I have no clue how to say it in.
So I'm off for a while. I might post from my laptop if I have the time, but I pretty much doubt it. ;)