Show result excerpt of layered navigation filtering

hi,
On my woocommerce website I like to add a top-line to my page to show a kind of excerpt of the layered navigation filtering.
We have a lot of product and sometimes it’s not clear that something is happening when using the layered navigation filtering.
So I like to add a line just above the products which says how many products are within the filtering results and on which term of the attribute you are filtering. I have 3 attributes (theme, genre, age) which all containes several terms.
So I like a line like:
Found 46 products. You are filtering on X, Y, Z
So I want to find out how I can display the number of products within this filtering and how to display the names of the terms the visitor is filtering with.

Thanks in advance

Karin

http://wordpress.org/extend/plugins/woocommerce/