Use system.tag.browse
to get all the tag paths from the folder, and pass each tag path as a parameter per instance in the flex repeater.
Build your embedded view (the one that the flex repeater will use) to accept a tag path as a parameter and use that to indirectly bind to the tag.
The instances
property of the flex repeater expects a list of dictionaries.
dictList = [{x: 1, Y: index} for index in xrange(10)]
is the basic list comprehension for making a list of dictionaries.
Edit: Found this post which is accomplishing a similar task of looking through a folder of tags and adding instances to a flex repeater. Should help to point you in the right direction: