Because I am curious about *cough* obsessed with Jake, I had to sniff this out.
The story is false. E's "Top 10 Daily Stories" debunked it last night - the host said something like "Sorry folks but this one ain't happening. Our sources tell us this is absolutely not true - they are not a couple - Gretchen Bleier has a serious boyfriend." SNAP!
This particular show on E that debunked the rumor is HOSTED by an ESPN guy, Sal Masekela, that also HOSTS ESPN's X-Games, and the snowboarding chick and her REAL boyfriend, snowboarder Chris Hotell, both participate in the X-Games. The ESPN guy is apparently friends with her and her b-f - he probably called them up himself and quashed this story.