Have you enabled SharePoint to index documents with the vsd extension? Are you
able to find the document otherwise? Meaning by metadata you are adding or
Title?

Yes, the .vsd extension is in the search types list, and i can find
the document by typing the name into the search box fine...but I
still can't get any content, and it looks like no metadata is
indexed either...

A reference to a Metallica band member? Not sure how many would catch this one.

A few questions that I should have asked as well:

Version of SharePoint? SP1?
Version of Visio documents that are in the system? (appears that only 2002 and
2003 are supported)

We're running SharePoint 2003 with Service Pack 1 for both WSS and
SPS. I'm positive we're using Visio 2003 for the majority of the
Visio documents, there might be a few 2002 floaters though, but that
shouldn't matter at all...I really don't find much importance in
indexing Visio content  for our organization at the moment, but I'd
at least like to find out how I can get it to work when that time
comes (I'm actually looking more forward to enhancing the search
capabilities programmatically). The PDF iFilter works fine, that
installed without a hitch and I'm seeing results.

...STILL haven't gotten this to work....any ideas, please?! I
followed every direction for the install.

Were the documents you are testing uploaded before or after the iFilter was
installed? In some (all?) cases only new files get their content  indexed when a
new iFilter is added.

I just did a test, deleted and uploaded the same file I had been
trying to test the iFilter on...and it still wasn't working, it is
only getting the title and the properties in SharePoint.

We also have not been able to make this work, and we are working with Microsoft
Premier Support to resolve; I will post if if we solve.

Thanks, hope to hear from you whether you get it resolved or not!

It looks as though I finally have an answer to the problem  I was
having with the Visio iFilter...I think someone here had mentioned
something about it before, but perhaps it bears repeating.

I called Microsoft Tech Support and through a lengthy call and
intense testing, it looks like the only Visio files searchable
through the 2003 iFilter are the ones that are created in the 2003
format. The files I had been testing had been unknowingly (to me,
that is..lol) created in 2002 and in one case even 2000 formats. So
it looks as though if you want to be able to search Visio files,
make sure the iFilter is the same version as what your files are
created in (e.g. 2003 iFilter for Visio 2003 files, etc.)