Who would use our upcoming service LinkCatch

I wouldn't. I use trunk.ly for keeping tabs on the links I post to various sites, that's about all I need.

I would just like to clarify for people that it doesn't monitor links you send out. It's the opposite, it ranks links that people are tweeting and appearing in your Twitter timeline.

A lot of the links I post to Twitter come from Reddit or Hacker news, so no

Seems interesting enough, i'd give it a shot.