Sogou (the deer could be done a bit better)
iAsk (quite a funny Santa Claus)
Soso (for this one, the theme is not very clear, it would be better as a commemoration of the opening of the Qinghai-Tibet Highway)
Qihoo (there are great resources in this logo, but they are not well utilized. The two eyes could be used as Santa Claus...)
Yahoo (the portal China Yahoo has another festival logo, but this article collects search engine logos)