After doing some digging it looks like there is a tentative release for next week but to be safe I would say in the next couple weeks you will start seeing the new versions released that support ESXi 5.5. Let me know if there is anything else I can do for you.
Hi, Is there any word on when there will be software and support for ESXi 5.5 for the MEM and VSM please?
ESXi 5.5 support