folksonomy and tag cloud

Thanks all for the earlier replies and suggestsions.  I've gone with
rst and it's working well so far.

I'm attempting to implement the folksonomy plugin now, and have it
working and displaying my tags, but there's something conceptually I'm
not quite grasping about getting the tag cloud display to work.

Although I have various entries defining two tags which show up
properly using $tags -- the only thing that shows up when I place
$tagcloud into my flavour is "None".

In addition, I'm not real clear on what I should be doing with the
tag_url configuration variable.  Should this point to a directory I
create on my server?  Or should it be a subdirectory of my blog?  Do I
need to put any files in this directory or generate a list of my tags
manually?

I've re-read the docs in the plugins a couple times but obviously there
is something I'm missing!

Thanks,
Ray

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