HP Customized version of ESXi 5.1 is now available!
Download:
https://my.vmware.com/web/vmware/details?downloadGroup=HP-ESXI-5.1.0-GA-10SEP2012&productId=28
Release Notes:
http://h10032.www1.hp.com/ctg/Manual/c03537464.pdf
Also, an updated version of the HP Customized version of ESXi 5.0 U1 (October 2012) is also available:
Download:
https://my.vmware.com/web/vmware/details?downloadGroup=HP-ESXI-5.0.0-U1-15MAR2012_V2&productId=229
Release Notes:
