Anyone use Hop oils?

Terpenes are a little different than just "oils", although in the same ballpark. The main issue is that they're hard to source in homebrew quantities. You can buy large packages/cans, but I'm told it doesn't keep well and you pretty much need to use it once you open it. This is one of the things I'll be talking about in my HBC seminar, so I've been looking into it.  About all I can find is Hop Shots.  They seem to be either Cascade or the "artisanal" blend...Cascade and Willamette!