This is not exactly what you are asking for, and maybe you already know about this, but have you seen these monitor stations? http://www.ncdxf.org/beacon/monitors.html
I'm in Estonia right now and regularly monitor this station: http://sm6knl.se/faros/Gif/
There's a list of monitor stations under the links.
Of course, that's not going to send you a message when the band is open. That exists for VHF here if you join and it works well: http://www.vhfdx.info/spots/map.php?Frec=50&Map=EU
I think you could program some sort of alerts if you go here: http://www.dxwatch.com/
Just some ideas...