Microsoft has discontinued its line of Digital Image Suite products. They report that many of the digital imaging features and tools are included in new Microsoft titles and services including Windows Vista™.
However, I have Vista and when I went to look at the features I did not find much in the way of a drawing program – just a photo organizer and limited editing like red-eye removal. Maybe they will be bringing something else out in the future.
For the official statement, click the software box at the left.