Many of the questions for Impromptu are concerning how exactly to use Impromptu as a confirm to remove an element from a list(database or just the dom). Its actually pretty easy, and so I whipped up an example of removing users from a database. Each user has a userid which I pass to the php file, the php file passes back true/false if it was successful. Then we remove the user from the html dom or either throw an error message. The examples can be found here, just view the source for the code:

Delete users from a list

http://www.trentrichardson.com/Impromptu/demos/demo1.html

Edit users from a list

http://www.trentrichardson.com/Impromptu/demos/demo2.html