I have tried this on the intranet, and it works very well.
What I do not very understand yet, and this application could help me, is that people are not looking at the web page at all.
I asked my colleagues if they've seen it, and they are very surprised : "hu, it's cool but I didn't mentionned it!".
It looks like an effective com must bound an email and a web page : that could be the lesson.