How much awesome can you cram into a 200MB live CD? A whole lot. NimbleX comes with 550 packages preinstalled, and you'll find the usual Linux apps here: Firefox, K3B, XMMS, MPlayer, Gimp, Kopete, Transmission, Klam AV, and K Office, to name a few. Boot times are wicked fast, even from CD, and installation to a hard drive or USB flash drive is dead simple.
If that's not enough, you can customize your own ISO on their website.
NimbleX 2008 has just been released and is getting rave reviews at the downloadsquad.