for the SMF theme. It should be in theme settings somewhere, just switch the box to say show member names.
This would help out to see who all is viewing a popular topic without the need to constantly go to who's online. Note, the Board default already has this, but the SMF theme doesn't. At least I think it is that way, I am not sure.
EDIT: Thanks for adding this, I am now locking the topic. Problem Solved ^_^.