It's difficult finding new info when you don't speak Korean but I gotta keep the thread alive as best possible so I did some scouting to other forums to see what they have come up with.
This is from Hana at MM-BBS, all credits to Hana
OK, I found a little more info on her. Her real name is Shim Soonmin (so her stage name should be romanized as "Shimmin" or "Simmin", depending on how you like to romanize Korean), and her debut was on m.Net's "Super VJ Model Selection Conference" in 2003. Some of her previous jobs have been "Matchmaker 'S'" (XTM, 2005), "Weird Girl, Weird Boy" (KBS, 2005), "KBS Sky Sports 'TV Game Club Recreation Room'" (2005), "M.net Wide Entertainment News" (2004). Her hobbies are movie appreciation and room decorating (I think? Not so sure about the last one).
So her Korean name is Shim Soonmin, cool now I can see how she got her nickname.