The current RadPivotGrid handles sum, count, etc. but does not handle 'distinct count'.

To elaborate: a field contains numerous different values that are duplicated over a number of rows - 'distinct count' counts the number of distinct values in the record set.

Looks like someone has already submitted a similar question/request:
http://www.telerik.com/forums/count-distinct-aggregate

Hope it makes it into a future release. :-)

Many thanks,