This plugin provides a Plain Text w/typeahead field type, using Twitter TypeAhead.
Download the code and upload the folder 'nptypeahead' to your Craft plugins folder. Go to Settings > Plugins and install it.
You now have a new field type, called 'Plain Text w/typeahead'. Use the field's settings to select the fields you want it to get values from.
That's about it.
- Initial public release