I want to use a form to create a dynamic product kit.
I'll use the webform module which let you create a node that is a form.
It let you decide how many times a user is allowed to use a specific webform.
It also let you add php code for validation and processing.
In the near future it will support dynamic select options.

When a user will submit the form I'll update the cart with the chosen products.

I think that this could make ubercart ultimatly modular because you'll be able to build any form with any combination of products on the fly.

In my case I'll use it to present the menu of the week of a resturant.
one webform will show a form with all the products in the menu with check boxes normal size and child size.
A second webform will show a form for dynamic product kit - a meal with options for a main dish and desert. The price will be lower then in the previous form.
A third webform will be identical to the previous one only for child meal with half the portion and a different price.

The store admin will put a taxonomy term "active menu" or with a date "1.3.08" and the webforms will intelligently show thous products in a list for each week. That simple

I want to start and work on this baby but I need your help.
Could you direct me to the functions I need to call in order to create a product kit dynamically and populate the cart with it?

Thanks