Um, yes it turns on the screen, that is kind of the point of it :)
You can set the screen timeout in sms popup to 10seconds if you only
want it on for a second ... I guess I could add an option where it
doesn't wake the screen at all, but then when would you use it? Only
when you're already using the phone? Or you would want it waiting for
you when you unlock the screen next?
Adam