Walmart has updated their site with a listing and bio for Wheeljack (Que):
When he first learned about the laws of physics, Wheeljack took them as a
challenge to his intelligence. Laws, after all, were made to be broken. The
Autobot technician had dedicated his life to pushing the limits of science. More
often than not, his inventions have failed spectacularly, but when they succeed,
they often change the course of millions of robots' lives.
There is no official release date set, but it is expected to be February 2012.