Swine Flu is scary stuff and it seems to get getting worse and worse in America and Mexico. There haven't been any reported cases in Korea- thank gosh and I don't think it'll be much of a problem. Korea uses mainly domestic pigs, so I think they are isolated from the infected masses. Now I'm sure that the visa requirements (i.e. for E-2 teaching visas) for foreigner pigs are so tough that they wouldn't even bother coming to Korea.
Plus I heard they feed the Korean pigs Kimchi. Kimchi is the cure all for everything. Apparently that's what kept the Avian Flu away, so I don't think the swine flu has any chance.
Oh, and a final note. What's scary about this epidemic is that this flu can be transmitted from pigs to human, so I wouldn't recommend kissing any pigs like in the picture above. Plus, cook your meat to around 70 degrees celcius (140 F). This will kill the virus.