Linux.com has a review of Gentoo 2007.0. Looks like there are some significant issues with the live discs, especially if you have an ATI video card.
Gentoo 2007.0 is available in several formats for various platforms. As per its torrent download statistics, most popular are the live DVD, the live CD, and the minimal CD for x86 and AMD64 platforms. The live CD contains Linux kernel 2.6.19, Xorg 7.2, GNOME 2.16.0, OpenOffice.org 2.1.0, Firefox 2.0.0.3, Thunderbird 1.5.0.10, Evolution 2.8.2.1, and X-Chat and Gaim (now Pidgin) for IRC and instant messaging. The DVD version has everything the CD has, along with KDE 3.5.5, XFCE 4.4.0, GIMP 2.2.14, Abiword 2.4.6, KOffice 1.6.1, and several other applications, tools, and libraries.