Techgage just posted an in-depth look at game (console, dos, arcade) emulation under Linux. In addition to general information, they explore nine different emulators and also explain how to install a gamepad (including Xbox 360 controller).
Quote: A common complaint about Linux is that there is a general lack of games. When emulation is brought into the picture though, it opens up a huge world of gaming possibilities. In this article, we will be looking into what emulation is, installing a gamepad and taking a look at a selection of emulators for different consoles.