I recently released a new 2 hour training course called Best of vSphere 4.1 for vNerds, and as part of that course I explored the new vSphere 4.1 feature which allows you to import Hyper-V virtual machines to VMware vSphere. As a robust platform for cloud-based infrastructure, featuring high levels of availability and responsiveness, VMware vSphere offers a great solution for business continuity and disaster recovery.

--> The rest is on Petri's website :

http://www.petri.co.il/import-vm-hyper-v-to-vsphere.htm