Dunno if anyone has heard of them, but Lostprophets, Matthew Good Band, Kill Hannah, Alexisonfire, The Libertines, and Greenwheel are my current addictions.
Kill Hannah is actually a really good friend of mine's boyfriend's band and that's how I got into them but they're quite good. I definitely recommend them. "I Wanna Be A Kennedy", "Sick Boy", and "Unwanted" are probably (in my opinion) their best songs that really epitomize (is that a word) exactly what their kind of music is.