Miegakure was first shown at GDC in 2009. The first blog entry is also April 2009, so not as early as 2003, but it definitely began development in the late 2000s. It's been at least 12 years in development
I can't recall where I first saw it, I think it was linked by this Linux gaming site (happy penguin?), or maybe it was some gamedev site. Anyway it might have been 2009, both years seem equally forever ago to me.
