I think there is only one song off of this week's #9 album by Silverchair that I've heard before. Tomorrow off of Frogstomp got a decent amount of airplay when it came out. The rest of the album seemed new to me, and my last.fm history pretty much confirms it.
Silverchair definitely rode the tails of the Grunge wave, and they did a good enough job of it to sell a couple million copies of Frogstomp. I don't think that I will increase my Silverchair consumption a great deal, but perhaps I'll think it more often when I'm in the mood for some Grunge. You might consider the same!