Several websites present themselves as mysterious content nodes this weekend. They could be alternate reality games (ARGs), viral marketing, art projects, or something... other.
Here's the first one. Red Monday presents a countdown. They invite email, which might lead to something else. This could be religiously-themed, as the main site's password is Biblical (check the source code).
Mobilepodcast reports an encounter with a mystery man, who gave them an envelope pointing to the site.
Nothing by email so far.