Never had a need to do a tempo map before.
That's life Hey?
Now I have done one..............
This is SOOOooo COooool !
Cakewalk  Sonar.... (can I still say Sonar?) affords many brilliant tools.
Sorry if I am Boring the well versed .
This video was brilliant (and Short) for those who may be interested at this point in time.
 

Never used that before, but did a quick test after reading your post and it works very well. Always ignored melodyne as I am not intersted in vocal pitch corretion and thought that was all it did. Live and learn. Thanks for the tip!