Your screenshot in the OSX Desktop thread shows that you've already installed uTorrent, so I'm guessing you don't need a torrent app anymore. Although if you did, i would suggest Transmission.
For your IRC needs, you can either go with Adium (with the added benefit of connecting to msn/google talk/yahoo/insert chat service here) or, as a standalone client you can use Limechat, or Colloquy (which is rather dated, so don't know if its compatible anymore)
For eyecandy, use geektool, and then google the numerous hackintosh/mac sites for geektool scripts that you can use. Also, Candybar, for changing icons and the dock, and Bowtie, which is a really neat addon for iTunes.