Google Sites "list" page functionality

Google Sites has a page type called "list" as an option when creating a new page. Unfortunately this does not appear to be a gadget so I cannot just copy the code and use it in my pbwiki.

Howerver I think the funtionality is really useful - it allows you to create a table with any number of columns amd associate each column with a data type (checkbox, date, dropdown selected from specified choices, text and URL). Can this be done with pbwiki and if not are there any plans in store to implement this functionality?
 
silly I’m wondering
Inappropriate?
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