Great new page I just found. Spinsanity.org takes media myths and spells out the truth-- albeit a little too run-on, but still helpful nonetheless. Here's a good excerpt from one of the exposes, although it could really apply to their cause in general:

In their rush to churn out content, many uncritically spread reports that later turn out to be distortions and lies. And when sober-minded people point out the truth, the myth mongers are rarely held accountable or forced to issue corrections. As a result, debunked stories are dredged back up and repeated all the time. Until we can correctly remember the past, it seems, we will be plagued with further distortions of it.