Try my topic tracking website

Hi, I've finished the basic functionality for a topic-tracking website and I'm looking for some user feedback.

http://dev.rsearch.ca

The target user is someone who, for whatever reason, regularly Googles/searches for some particular term to see if the results have changed. This is quite general but some applications might be PR firms, or researchers trying to stay up-to-date with related research.

There's a free user account. The idea is: you sign up and enter a topic and just wait for the emails to roll in when new related words are found.

I would appreciate any feedback whatsoever. Thanks!