Although many of these traditional houses have been razed to make room for apartment buildings and office towers, there are still large pockets of well-preserved hanok, even in Seoul. In addition, thanks to a recent rise in both public interest and government support, many hanok are being preserved or converted into cafes and art galleries, and entire new villages of hanok are being constructed throughout the country.
I'll try to find some time soon to explore some of these traditional neighborhoods. (I'm not sure, actually, if calling them "traditional" is entirely accurate, since some of these renovated hanok are now among the most coveted homes in Seoul.)
Until I take my own pictures (which won't be this good anyway): http://korean.visitkorea.or.kr/kor/hanok/index.jsp
"We shape our buildings; thereafter they shape us."
- Sir Winston Churchill