no. I'd rather the Broncos draft a young RB than spend a 2 on Stewart. I know peeps will say "well the Broncos have sucked in the past drafts so just trade the 2 for Stewart..." the thing is that past draft success or lack of success does not determine future success.
Now if the Broncos can get Stewart for a 4th, then yes, go for it. But with the Broncos needs on defense, I'd rather they attempt to draft some young defensive talent.