This one is like a no brainer. Looking for whats going on in mainstream KPop? Look no further than AllKPop.
Another main staple when it comes to getting your KPop fix. Soompi isn't always the first to report things but always has the most extensive amount of KPop articles.
Asian Junkie is awesome because the things your thinking about your favorite KPop (and even Japanese) stars or the things you've heard about them around the web are discussed in a completely in-your-face tell it like it is way. Brutal honesty, Brutal opinions, awesome content. Worth checking out. ::disclaimer - not for faint of heart or easily offended::
Another awesome editorial site. Seoulbeats talks about everything from fashion to dissecting the latest music video's choreography. Mainstream and for everyone's viewing.
Want to watch the latest or greatest kdrama? Choose Viki for a great community and plenty of options.