The above web address in the blog post above is incorrect. The actual I-Care website can be found here:
I-CARE FOR APPLE
South Korea, Busan
Haeundae-gu, U-dong, 1434
Floor 8, Suite #809
Language: Korean / English Speaking -
The webpage is in Hangul mostly, so it is easiest to just call them if you're a foreigner and speak English.
I'm an expat working in Busan from Seattle, WA and was able to have the owner replace my shattered iPhone 4 glass/digitizer in 15 minutes. He also replaced my home button because it was worn out and unresponsive. The owner performs all the repair work and knows his stuff. Prices are very reasonable and he is an honest, up front guy.
He has every iPhone replacement/repair component on hand. I'm actually coming back to have my 2nd iPhone's vibration function replaced in a few days.