Ok, it appears that about every continent does have at least one "Silicon" area. The names are derived from the original walhalla of computer geeks: Silicon Valley. Those areas are characterized to have a higher density of technical and IT related companies (and maybe want to be like "the real place to be" ... Silicon Valley???)
Here's a list of those Silicon places all over the world, in random order:

Silicon Valley
Silicon Wadi
Silicon Glen
Silicon Alley
Silicon Hills
Silicon Heaven
Silicon Hell
Silicon Forest
Silicon Fen
Silicon X
Silicon Isle

please /msg me if you have additions.