Hey! Illustrator rocks!! I am a professionnal user and I have to tell you that the software is really awesome!!!
As a graphic designer (specialized in UI) I have to align stuff all the time:
1- I would like to to be able to align the text to x-height inside a box rapidly. ( for instance the words inside a button )
2-It would be nice to be able to align the stuff that has been duplicated with the Transformation... tool
For now in both case I would have to decompose a dupplicate of the transformed shape and manage to make it the same size of the box...it is doable but it is a bit of a pain!