Facebook Style Multi Select
We've got a couple of projects on the go right now where a Facebook style multi-select (with or without autocomplete) is a good fit for making the user interface more, err, useable.
As ever, searching around there are a number of options - especially given the number of Javascript frameworks around. For us, things are also complicated by the fact that not all our projects use the same Javascript libraries - we're not always responsible for the front-end code and as such some clients already have a dependency on, or a preference for a given library.
