The initial download images for Debian GNU/Linux 6.0.5 were made available over the weekend. This is a "rollup" release, it forms a new installation base for the Debian 6.0 "squeeze" stable branch, it does not add major new functionality or features. If you have Debian 6.0.x already installed, it is not necessary to reinstall, you only need to install all the latest updates from your nearest mirror site.
At this time only the netinst image is available, which allows you to boot a small installer image (about 180MB), and then pick up all the necessary packages from a mirror via wired or wireless (WiFi) network connection (ISDN and Cellular are not supported). As usual, the rest of the assortment of Live, CD and DVD images will be added over the next few days/weeks.
As has been the norm for the 6.0 release, all of the ISO files are hybrid images, which means that they can either be burned to CD/DVD or copied to a USB stick.