CGEmpire is a relatively new site (kinda like www.cgtalk.com) however it's very small, personal, still and very helpful in game//art/music making.
They are having their third contest. One can compete in either form of pixel art, 2D or 3D (all in one division):
Winter Wonderland
They have included sponsors and prizes. The competition was announced 6 Dec , and the deadline is 31 January 07.
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 | Austrailia Day January 26th since 1788 |
 | Chinese New Year January or February |
 | El Dia de Reyes January 6th |
 | Elvis Presley's Birthday January 8th |
 | Kwanzaa December 26th - January 1st |
 | Lohri (India) January 13th |
 | Martin Luther King, Jr. Holiday Celebrated on the third Monday of January |
 | New Year's Day January 1st |
 | Republic Day (India) January 26th |
 | Shogatsu/Japanese New Year (Japan) January 1st to January 3rd |
 | Tet Nguyen Dan (Vietnamese lunar New Year) First day of January of the lunar year |
| More holidays | |