It looks like the uptake of data wireless services has been quite good in South Korea.  The data portion of the ARPU for mobile operators has grown steadily in 2004, with a gradual crescendo that peaked in Q4 (16.5% as opposed to a 13.9% increase in Q2).  Year-over-year, the results were even better, with data services growing at a rate of 36% YoY in Q4.  SK Telecom has lead the way, notching almost a 22% growth, up from 17.5% from two quarters before.  The operator is currently investing in a WCDMA/HSDPA network in parallel with its EV-DO network, with almost 40% of its CAPEX being earmarked towards this new HSDPA initiative.  About 35% of SK Telecom's subscribers are on its 3G EV-DO network and 19% have VOD (via the "June" service offering).  The Korean Network Information Center claimed that more than 40% of the mobile users utilized Internet services (the data is from a survey taken in the second semester of 2004).  The future prospects look bright, since 84% of teenagers have these services and 63% of folks in their 20s.