Just noticed that Meta posted the date of their Lucky Packs!
Quoted from the site:
2010 Winter Lucky Pack & Winter Sale
Winter Lucky Pack will be available at approximately 12:30 on Dec. 20th (Mon)
in Japan time at our online store.
Winter Sale will start at the evening on
Dec. 23rd (Thu).
More info on the Japanese page: http://www.metamorphose.gr.jp/news/m-metamornews549.htm
Edit!: They have a page up for it now!! Link updated! Also added the link to the Japanese page!