Wow! Thank you. You only missed Yoon Si Yoon (enlisted on April 28, 2014, Marine Corps).
As for other celebrities, I only know about actor & comedian Choi Hyo-jong (serving in Seoul Police Special Promotional Unit). He was enlisted on October 6, 2013.
What about the term of service, it was changed (cut just a little) in December 2010: 21 months for the Army and Marines, 23 months for the Navy and 24 months for the Air Force.
http://koreajoongangdaily.joins.com/news/article/article.aspx?aid=2929994
And the same 24 months for not active duty service. So you can easily count the day of release:October 24 for Kim Jungmo (public service), October 21 for Lee Seok Hoon, December 4 for Ghun (public service) and Yoo Seung Ho (active duty), December 18 for Seven (but he spent 10 days in military prison last summer, so he'll be discharged on December 28th). And so on.