What I want to do is relatively simple but the assortment of modules available makes "the right answer" harder to find. After reading about Views, an assortment of Taxonomy filters and Finder I decided it was better to ask.
I want to do selection from two taxonomies, one step at a time. I will offer the "making a sundae" example to show what I am talking about.
The user will first get offered a list of ice cream flavors. They can pick one or more flavors. This will get them a second page which will show possible toppings where, once again, they can pick one or more. They will then get another page with links to the specific "recipes".
The data (each recipe) will have a list of terms from the "flavors" vocabulary and a list of terms from the "toppings" vocabularly. The final list (after the second select) will offer links (probably just titles but maybe teasers) to all the recipes that matched at least one flavor and at least one topping.
I really do what this to be two steps rather than just a single page where they could select the flavors they want and the toppings they want.
And, yes, I really want a Drupal 7 solution. "Dev" status modules is a non-issue as the site will not be going live for quite a few months.