Ability to select multiple items in the deepest level, to add them all at once to the dropbox

- How would you want to do this?
- Why would you want to do this?

Like this video http://www.mediafire.com/download.php?yzzybqtzyjm .
It's a form I'm trying to develop to filter contacts and send them a message.
The first multiselect is a taxonomy form and the second is a multiselect list of nodes (this is a little list, but you have to imagine to have a big list of people).
Since this feature is really close to what dropbox actually does (and my code is full of bugs that I didn't show in the video) I thought to use the hs functionality, but I noticed there is no support for multiple selection in dropbox module.
I wonder if it could be set some how.

* Why? - I'm also looking for the feature. My use case is that I need to several (child) terms, and I don't want to click on the 'Add' many times.
* How? - It could be a 'normal' multiple select or selection with checkboxes (when I added '#multiple' => TRUE in _hierarchical_select_process_render_hs_selects() I saw it already added those checkboxes). EDIT: I had better_select module switched on, so I saw the checkboxes.

subscribing

subscribing

Okay, I've thought about this before too.

1) *If* this makes it in, it'll be in the form of #type = select and #multiple = TRUE, *not* in the form of #type = checkboxes
2) This is a feature that will *only* be available when the dropbox is enabled.
3) It's been a while since I've been deep into HS, so I'll have to think more deeply about the possible implications of adding this.

But it'll get added. If anybody's willing to write the necessary patch (or start working on it, because it'll have to be configurable in the UI as well), I'll gladly accept your work :)

Not much interest + busy + I really need to get version 3 final out = this will be for a 3.x point release.