All four issues of GROOM LAKE are available at the iTunes App store for the iPhone and the iPod Touch. I'm a bit biased but Templesmith's artwork seems perfectly suited for this format. Here're a couple looks at how it appears on-screen.
And in another bit of GROOM LAKE news, the trade paperback collection is due in October. It'll include a new intro from writer Whitley Strieber (COMMUNION, THE NYE INCIDENT) and all the pin-ups that ran in each issue, as well as this one from Klaus Scherwinski, done solely for the TPB: