Don't remember anyone mentioning Korea in the recent talk of cash+phones, but this is from a BBC article (regarding broadband content access), might be of interest:
"By far the most popular way of paying for content in Korea is a simple system which gives surfers a pre-paid cyber-wallet to spend. Users buy currency in advance via a text message and are sent an authorisation code which is typed into the website and debited from their mobile phone bill." ok, so it's not full on digicash exchange through a portable device, but it's a step in that direction. Article says Europeans are unlikely to embrace it (now there's a surprise...). Doesn't mention what kind of system is being used, or if they've got anything else planned. http://news.bbc.co.uk/1/hi/technology/2326253.stm
