It looks like a meta Google alerts, but it's open source and hackable, which can be really handy. A documentation of how to write custom alerts would be useful, I guess.
Also, you should host a demo somewhere.
Also, you should host a demo somewhere.
Re: Google Alerts - you're right... to a certain extent. Here, you can mash up datasets, compile them, tweak them, THEN and only then compare them to parameters you set. Alerts++, then.
Here is a screenshot of the alerts I received this morning: http://imgur.com/vG0PqDf
The alert was set for London Euston area.
I will add an issue to the repo because, as you see, the styling is not very pretty - and the wording is far from eloquent!