It's not Wifi unfortunately, but I've been trying out the new Cabela's 4/8/10/12MP Black IR game cams (with lots of IR LEDs) - and I have to say, I am incredibly impressed. The pics are incredible - the video is sharp. They have great features, including the ability to fully adjust multi-shot and set the PIR wait on a wider range of values rather than the typical 30sec, 1min, 2min, etc. It has temp and audio recording. And a viewing panel for the pictures right on the cam - and it's only around $160 !!!
Here is an example in daytime
Here is an example of early morning
Here is an example of night