Due to the revamping of the bard class, I expect almost every bard to be trained in at least two types of Perform skill to maximize the potential of the class. Therefore, I recommend that there be at least two entries for Perform, just so players don't have to write it in at the bottom.
As an aside, it would be nice if there were a couple of extra blank lines at the bottom of the skill list for house skills (Endurance is a popular one) or those players who decide they want eight different professions.