The idea of notifications that you can sign up for without downloading another app is incredibly powerful. You could sprinkle these buttons within Tweets and Facebook posts. Most interestingly, I think a Yo subscription humanizes the service. It almost feels like ProductHunt, your friend, is calling out "Yo!" to you as a person.

@rrhoover Is PH's yo button working? Tried doing it and no yos so far, yo.

@orarbel just released the Yo Button, a widget you can embed on your site. It looks like this: Once the user clicks the button, it displays the username to "yo" to get a "yo" when that event occurs. I just created one here. When a product reaches 50 upvotes on Product Hunt, you'll get a "yo." Or - want to jump in w/ more details, yo? Here's the original Yo thread.

there's a big vision for Yo - you'll all hear it soon straight from Or :)

Wow, I really like this. I'm actually starting to catch the Yo vision. Context is king!

Please make it stop.

I suspect this will be huge