Great link to Matthew Newsome's site.
I've only skimmed over a few of the pages, but I was pleasntly surprised by this quote from his first time wearer's page...

"Keep this in mind throughout. Unless you are a member of a military regiment, a pipe band, or some other quasi-military group that has a specific dress code, your kilt is not a uniform. It is an article of clothing, just like your trousers, and you should feel free to accessorize it however you think best."

Kind of reminds me of Bear's stand on kilt wearing.