I bought one yesterday and got a 2gb card because I couldn't find any bigger ones there. Is that Homebrew shit just psx emulators or are they ripping psp games and playing them? I tried looking through the homebrew topic but it was fucking huge.
Homebrew is a catch all for programs, original games (or ports of older games like Cave Story), emulators, and the like. There's no PSX "emulator" because the PSP emulates the games itself. You just need to hack the firmware to bypass the security measures.
Ironically enough, it's all legal according to Sony's End User's Agreement but they crack down on it because of the rampant pirates.