Yes, there are over 1,000,000 foreigners in Korea. You can read a post by The Marmot's Hole here:
http://www.rjkoehler.com/2007/08/24/foreigners-break-1-million-mark/ According to the post, Jeollanam-do doesn't have a high percentage of that million, I guess because of the relatively low population of the province.
One statistic I'm interested in is the number of international marriages in Jeollanam-do. (It's important to be skeptical with the stats you find in English-language sources in Korea, but) According to one site, 37.6% of marriages in 2004 in Hampyeong county were between a Korean and a foreigner.
http://blog.joins.com/media/folderlistslide.asp?uid=dhseol64&folder=4&list_id=7559782 That website also says that about 18% of marriages in Jeollanam-do are international, and I've seen other sources that say it's as high as 25%. The language isn't clear, though, and I don't know whether they actually mean 18% of all marriages, or 18% of all new marriages. Anyway, everywhere you look there are mail-order bride brokers.
The idea that Korea is multicultural is ridiculous. I'm not using that as a slight against Korea, because we've witnessed multiculturalism go terribly wrong in the US, UK, and elsewhere. But like Samuel said, that foreign population is pretty isolated and kept in certain social and economic circles. It could become multicultural over the next generation or so, especially with the influx of mail-order brides and mixed-race children, but it's not there yet. Hell, look at all the Chinese, Vietnamese, Thai, and Filipina (sp?) women in Jeollanam-do already, and then look at how many authentic ethnic restaurants you have. Almost zero. How many academies offer instruction in these languages? Almost zero (save for Chinese). How many times do you hear these languages spoken here at all? Almost zero. Korea has historically been pretty multicultural---mix of Mongolian, Chinese, Japanese, Indian, and European genes and cultures---but instead of embracing the ways it adapts to foreign cultures, it insists on the pure-blood company line, which opens it up to all sorts of easy attacks and charges of hypocracy.
Anyway, I'd really like to read more about the experiences of international brides here in Korea. Most of what I have read has been negative, as can be expected.
edit: Couldn't find information about that sauna who refused the Indian guy. Last year there was a story in the Korea Times about a woman denied entrance to a pool (
story here). A few years ago was the story I was originally thinking of, when sex industry workers blamed the drop-off in business on migrant workers, afraid that no Korean man would want to sleep with a prostitute who defiled herself by banging a brown guy.
