First, check out these real-time images of the sun. Notice anything interesting?
In fact, there haven't been any sunspots visible since an "All Quiet Alert" was issued on Oct. 5.
The correlation between Earth temperatures and solar activity is far closer than anything else. The more solar activity, the higher the Earth's temperatures. Less solar activity is followed by colder temperatures. There's a lag of about 2-3 years.
I don't know of any other time we've observed 0 sunspots at all, never mind for such a long period, though it certainly may have happened before and we just don't know it. What will this mean for us within the next few years?
Next are a series of videos from a presentation called Climate Change - Is CO2 the Cause?
Then there's this interesting article by one of the IPCC's expert reviewers.