Two modern LED block clocks. The Jonas Damon independent cube LED alarm clock. ($90 at Matter-->link). You can stack, align, or zig-zag them however you want.
The Kouji Iwasaki designed wood block clock. The LED digits shine through a thin veneer of wood bright enough to be seen. ($176 at Unica Home-->link)
And if those aren't big enough for you, or you're legally blind, check out the 12 foot long self-setting GPS LED wall clock built by Spark Fun Electronics-->link
via Refinery/Matter (cubes) & DesignVerb (wall clock)