During the last week or two, several rescue and specialist distributions have released new ISO images.
Clonezilla is a backup and recovery distribution. It currently supports ext2, ext3, reiserfs, xfs, jfs of GNU/Linux, FAT, NTFS of MS Windows, and HFS+ of Mac OS file systems. The latest release of the live cd bears the version number 1.2.1-53(download).
SystemRescueCD is a rescue cd based on Gentoo. The latest release is numbere 1.1.7 (downloads)
XPUD is a Taiwanese mini distribution that consists mainly of a web browser and multimedia functionalities. You can use xPUD, for example, for building an internet kiosk.
I have never tested xpUD myself, but it seems to boot very fast. See the video for a demonstration!
And last but not least, PartedMagic 4.0 has been released. It now supports ext2, ext3, ext4, fat16, fat32, hfs, hfs+, jfs, linux-swap, ntfs, reiserfs, reiser4, and xfs.