Father Saunders explains the O Antiphons very clearly here along with the appropriate scripture.
The symbols of the antiphons and explanation here via Catholic Culture
Here are some delightful crafts and antiphon activities!
Antiphon Guide from O Night Divine!
Just Another Day In Paradise: O Antiphon Activities
“O Antiphon” House « Our Domestic Church
By Sun and Candleight o' Antiphon House
Heart of My Home
Shower of Roses
St. Athanasias Academy
O Antiphon activities!
O'Night Divine - the symbols, the prayers, and links for the O Antiphons!
Fisheaters has the actual chants in Latin for download!
or get a CD
Tons of good resources at Illuminated Ink!
Also the Christmas Novena can be started today!