Pretty neat!

However, I think there might be a tiny bit too much friction in using it.

First, I have to remember how to get to your app again. Then I have to login. Then I have to paste a link in a box, & then I get another link that I take somewhere else.

I'm probably not going to remember your app until I'm about to post something into a social network somewhere else, & I'm not sure how much anticipated-friction I would tolerate in that situation.

Maybe a chrome extension would be neat down the road, or maybe if I could prepend something like <user-name>.plug.to/news.ycombinator.com/item?id=10063441

It's really interesting though! You should keep working on it!