Here's the basic TW core function calls:
store.getTiddlers('title')
gets ALL tiddler objects, sorted by title
store.getTaggedTiddlers('person','title')
gets only tiddlers tagged with 'person', sorted by title
this should get you going... but...
I like your idea of filtering the droplist by a selected tag value...
so I've added it to the "link" and "tiddler" QuickEdit button
definitions, which now include a second droplist, showing all tags in
the document... select a tag and the list of tiddlers is filtered to
show only those that match.
Get the updates here:
http://www.TiddlyTools.com/#QuickEdit_link
http://www.TiddlyTools.com/#QuickEdit_tiddler
enjoy,
-e
Eric Shulman
TiddlyTools / ELS Design Studios