Danny Sullivan offers a run-down of the most recent events on Search Engine Land. In case you’ve been too busy to watch campaign developments, I’ll start by saying don’t Google santorum or romney unless you really want to be grossed out. It’s worth studying what happened here, however, as an example of the power of links over time – and how that may be changing. We’ll start with Santorum’s well-known story. Back when he was simply a senator, in 2003, Rick Santorum publicly compared gay sex to man-on-dog sex. This angered Dan Savage, a popular and controversial columnist in the GLBTQ comm…