I can't say I have been that successful. We have been featured a few times, including Life Hacker: http://lifehacker.com/coursebuffet-organizes-online-courses-...

For Life Hacker I found the people who wrote about learning online and then wrote each one a semi personalized email.

The email said hey I have read your posts on X (something related to learning) this is why you and your readers would benefit from using us. Might be obvious but how can you benefit the readers is the focus not all about how you are cool.

Btw sometimes you contact writers/bloggers never hear anything then 4 weeks later without warning they write about you. Don't get discouraged because they don't get back to you. It doesn't mean they are not interested, just they are busy. Of course it could mean they don't care.

best of luck.