Today's Order of the Stick comic had the following exchange with the evil overlord (who's the father of the groups's nincom-bard):
"You're the one who taught me that bards are underpowered" "They are! With their mastery of narrative structure, they should be ruling the entire cosmos by now, instead of wasting time singing in taverns."
Which would be an interesting concept, that could probably be used even in a more serious, less fourth-wall-ish campaign. So, give me some powers that could be interpreted in working that way, manipulating fate etc. (Straight-forward, unmodified Luck and Serendipity would be rather boring answers).