Talk To Me In Korean(TTMIK) is an awesome sight for learning Korean. The best thing about it is that it is free! They have MP3 and PDF files for you to download so you can listen from the Iphone or any mp3 player. The teachers are good and the lessons are fun and interesting. They explain Korean grammer well and give you a lot of sample sentences to learn from. I've used other sources to learn Korean and while some others are also good for learning, I find this one to be the best one so far.
Other Good Sites to Study Korean
Sogang University Online Lessons
