cool javascript sliding boxes

Doing a side project with Rails 3.1 and knowing that there must be something possibly already a gem but possibly simply jquery (or another javascript methodology but have already started with jquery) that will have something like a bunch of boxes that I can populate with an array from one model to slide to an array from another model for has_many => has_many relationships (as opposed to boring drop-down selections)

ie

  People (names) Host (members)
+--------+ +--------+

User 1 | | User 3 |

+--------+ +--------+

have something like a bunch of boxes that I can populate with an array
from one model to slide to an array from another model for has_many =>
has_many relationships (as opposed to boring drop-down selections)

so I can drag and drop 'User 1' onto Host["members"] to add or drag it
out to remove.

Is the droppable plugin of the jquery UI something you can use? It does
that, you can move boxes in and out of other boxes...

http://docs.jquery.com/UI/Droppable

have something like a bunch of boxes that I can populate with an array
from one model to slide to an array from another model for has_many =>
has_many relationships (as opposed to boring drop-down selections)

so I can drag and drop 'User 1' onto Host["members"] to add or drag it
out to remove.

Is the droppable plugin of the jquery UI something you can use? It does
that, you can move boxes in and out of other boxes...

http://docs.jquery.com/UI/Droppable