This is interesting from Scotsman.com:

http://news.scotsman.com/archive.cfm?id=559852004

A quote:
The man who seems to have single-handedly created the market for modern kilts is Howie Nicholsby, the designer of 21st Century Kilts at Geoffrey (Tailor). Seen on Vin Diesel, Robbie Williams and lots of young men on their wedding day, these designs certainly don’t come with a rule book. "My philosophy is that we would make a kilt in anything a guy would wear in trousers," says Nicholsby. "We don’t do these Lion Rampant or St Andrew’s cross designs because if you want a Scottish identity kilt, a kilt’s enough, or wear a tartan one." He’s used to fending off the critics and says that after wearing a kilt on a daily basis for the last five years, the only people who approach him to complain are Scots. "When you walk about town and see people wearing kilts, it’s mostly travellers and tourists, because they’ve realised it’s a comfortable piece of clothing."