I don't think so.
Vertical text is an option for headers in pivot and straigt tables.Perhaps you could fake it with a dummy table?
Also, you can apply text at any angle in a graphical chart (such as a guage chart), using the Properties | Presentation | Text in Chart option. Once you have added this to the chart, hold down shift and control to highlight it and then move with the mouse. This is useful for vertical axis lables.
Hope that helps