The original site is dead, here is the latest usable snapshot. There's also a snapshot in 2016 but the links don't work (it also looks a lot different, but it's the same project and author. Maybe it was temorarily revived?)

Github repo

Retrospective (2012)

Related:

• "BITC – Everything you Require To understand" (some isolated blog post).
• "The origins of the BitC Programming Language" (Lambda the Ultimate, 2008)
• "BitC isn't going to work in its current form" (Hacker News, 2012)