It would be nice to have on the gift screen too, so we could select multiple girls to give a gift to (presuming the inventory/store has enough for all girls).
[Edit]
It would also be nice to be able to group girls together within a building. You could then assign and change jobs by groups, or do it individually. As an example, lets say I have three activities going on in a building: whoring, serving in a strip bar, and making porn movies. I could assign my girls to three groups, and then assign the groups to duties (group A whores, group B strips, and group C makes movies). When group C finishes a movie, I can simply change the job for the group (back to making movies, or perhaps a different job) rather than hunt down each girl in the list and change the jobs individually.
Alternatively, you could add a sorting function to the girl list, to sort by name, job, skill level for a particular skill, etc. Having both would be extra cool.