I just took a glance in the Kelly's Music and Computers catalogue and about the only thing in there besides ear training software is one called "Singing Coach"
and "Singing Coach Unlimited" that allows you to import your own MIDI files and twice the amount of songs.
Apparently it's a series of lessons that includes warm-ups, techniques, exercises and complete songs and comes with a headset microphone.
It tracks your singing and displays it onscreen and determines your vocal range by having you sing a high note, then a low note.

There's no info on price though and I've never used it myself so you might want to Google around a bit and get some reviews from people that have actually used it.