Well, I've been listening to all 70s and early 80s rock and metal recently, so it's probably stuff many other people are already familiar with: poison, queen, ac/dc, van halen, brian eno, david bowie, etc. They're discoveries for me because I didn't really start paying attention to music until the late 90s, and then I was mainly interested in mid 80's to then-current stuff.
The only out-of-genre stuff I've discovered recently have been tracks in the Rock Band games, so again they're probably things people here would already be familiar with. I guess I'll link some random things anyway.
The Main Drag - Jagged Gorgeous Winter
Modest Mouse - Float On
Baby's On Fire - Venus In Furs cover of Brian Eno
Let It Rock - Kevin Rudolf (No Lil Wayne version)