What alternatives and examples are there for selecting a bunch of items from a long list of items instead of a dual list?
This question has some nice enhancements on the traditional dual list, but I'm looking for other things to consider.
Best way to select a subset of items in a long list
Answer
Consider using a multi-select with tokens design. The filter-as-you-type feature is a nicety but not essential. These work well when the common use case is selecting either one or just a few, but the usability falls down quickly if you need to select many as the user has to re-invoke the menu for each item.
You've previously seen the tokenised multi-input method in your email clients. 
If the common case is to select multiple, you can consider a checkbox menu. The difference here is that the drop-down is persistent across clicks (plus visually communicates the multi-select nature), and thus the user can click-click-click to quickly select multiple items. For our web-app we are looking at enhancing this design by adding the tokens functionality.
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