It is really cool, got a great match right out of the gate! I'd consider embedding people's HN profile right in the emails instead of just a link, it would make the emails more interesting/click-worthy especially if the person's profile is pretty bare. Also second the other requests that 'my' first email shouldn't go out until I have the chance to fill in some parts of the profile, maybe just wait an hour or two? Again this is very cool!