I first noticed this when I was using the finder.HostSystem function for my project that's consuming govmomi. I thought it was me, but now I'm not so sure about that given the following output.

$ govc host.info -dc=858c7e1d-89f7-11e4-934e-80e6500a64dc -host.ip=192.168.238.139
Name:            192.168.238.139
Manufacturer:    VMware, Inc.
Logical CPUs:    4 CPUs @ 2793MHz
Processor type:  Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz
Memory:          4095MB
Boot time:       2014-12-21 19:20:50.556233 +0000 UTC
$ govc host.info -dc=858c7e1d-89f7-11e4-934e-80e6500a64dc -host=192.168.238.139
Error: no such host

finder.HostSystem is actually not used all that much in the code. In fact, after grepping a bit, the only place I found it was in flags/host_system.go. I'll have to dig in a little more, but I suspect this is something I'll have to fix to address the AddStandaloneHost and Destroy host issue I filed yesterday. In the event that I'm off base on this I'm happy to be corrected in order to save myself the time and trouble. :-D