The CentOS 6.1 CR repository is online, allowing CentOS 6.0 users to begin using the new packages ahead of the official 6.1 release.
Update 2011-09-30: The new kernel (2.6.32-131.12.1.el6) has finally landed in the CR repo. We have confirmed that it does use the new sda -> xvde mapping code.
SolusVM CentOS 6 Xen PV template users should implement the changes in an advisory we published in mid-July regarding a kernel change in the EL 6.1 series that impacts block device mapping under Xen PV for CentOS 6.1 guests. The essence of this change is that the vm config file for all CentOS 6 virtual servers should use xvda* nodes. If you are already using xvda naming by default then nothing is required. If you are using sda naming by default you will need to override that behavior for each CentOS 6 template you have deployed. For reference here is what your CentOS 6 VM config files should look like: