Hmmm, they ask for your email address, but there is no privacy policy on the site. What are they going to do with your email address? Use it, spam it, sell it to others?

Also, no loop-back check on email. What's to stop you signing up a dozen other people to this free service? It would be polite to bounce a "confirmation" email back first before sending.

+1 on the earlier comment about samples, and indication of notification format.