The first news of this hit the foreign community when

Fomos.kr had written several articles on the issue, one of which says that the player rigging began in 2008, while the illegal betting stretched as far back as 2006. Several other articles are summarized by the TL.net poster; these articles cover issues from how the scandal began to when the e-sports organizers found out and what their response to it was.
There are several high-level pro-gamers involved, one of which is

Illegal gambling and match rigging is nothing new in competitive sports. Scandals such as this have gone on in every popular professional sport in the world. Whether this further legitimizes StarCraft is a sport or not, controversy and scandals such as this one can only bring question and doubt into the integrity of the sport.
Links
TeamLiquid.net - Source
TeamLiquid.net - Rekrul (vblog)
Fomos - Source (Korean)