I've just posted up a plugin a wrote a couple of months ago for a personal project that allows del.icio.us like tag suggestions - i.e. as the user types, suggested tags appear which they can click on or press tab to select.
I think it's an important feature if you've got tagging on your site because it helps the user to narrow down their own subset of tags reducing the margin for variations on one tag or misspellings. The plugin, demonstration and documentation is here: http://remysharp.com/2007/12/28/jquery-tag-suggestion/ However, I don't have any access to IE6 - so I'd love to hear from anyone with feedback. Thanks, Remy Sharp.
