Browsing the Korean Indie section Hyang Music just now I came across a couple of interesting rock releases from this week, complete with samples:
Guckkasten released a self titled album on February 2. Sample two songs in short here or head over to YouTube to watch the video for 거울.
Phonebooth released their first album, The Way To Live On, after several months of delay on February 5. Hyang has samples for every song on the album.