Something to keep in mind is that 6.0 is out of date and you may want to wait until CentOS 6.1 (or the updates to it) are available.
CentOS 6.0 is now available.
A list of mirrors is available at http://www.centos.org/modules/tinycontent/index.php?id=30.
Make sure to read the release notes! The installer’s minimum memory requirements have changed and so has the i386 DVD size.
At a press conference today, Red Hat announced the availability of the latest version of their enterprise server, Red Hat Enterprise Server 6. You can read the full press release at http://www.redhat.com/about/news/prarchive/2010/new-standard.html.