So I've had experience with homebrew on the Xbox1, PS2, PSP, DS and Wii, but when I got my PS3, there was talk of it being uncrackable and such, so I didn't really bother following any developments on sites like this.
But now, everyone's talking about keys and Geohot, and this has me interested. I remember something about USB sticks a while back but didn't bother because they were banned in my country.
So as of now, what can I do to my PS3, with or without specific hardware? How developed is the homebrew?