The ability to segment by unique values in a variable

[#1]

I would love to create a segment where I could identify users who viewed more than X number of unique values in a given variable.  For example, I would like to see the number of visits that view more than 2 products.  If I use prod views, that could work, but what if I viewed the same product twice?  If I could say :

Products Unique Values >= 2

Then it would return only those who set two or more unique products in the product string.

[#2]

I second this. Furthermore, the ability to include the concept of "the same product unique value" in a Discover/ Ad Hoc segment would be most useful.

For example, let's imagine you have a site selling clothes. At the moment, I can create a segment for visitors who have viewed T-Shirt Brand X and then bought T-Shirt Brand X. Or I can create one for people who viewed Shoe Brand Y and bought Shoe Brand Y. So far so good, but what I want to do is create a segment for visitors who viewed any given brand and then bought the same brand. The brand can be anything, providing that the visitor viewed and bought the same brand. A subtle but important difference.

Is that feasible?

[#3]

Yes please! This is something I am constantly trying to jerry-rig solutions for using many sordid processing rule schemes.