Well, Shadowrun was really a blending of Earthdawn (which I played back in the day) and Gibson. So, a lot of our Cyberpunk was definitely influenced by his works (like Neuromancer) and its contemporaries (Snow Crash and Diamond Age by Stephenson, for instance). I'm also a huge fan of "Old World of Darkness", the Dresdenverse, X-files... and a lot of other stuff you guys haven't caught yet. And, hopefully won't until it's far, far too late.
And yes, Lovecraft is very popular with pretty much all the Staff

.