The blinking gifs are morse code.
The Lain face contains two blinking gifs, one in the top left hand corner, and one in the bottom right.
The first one (located under the Navi logo) translates to"2020.html"
The second one (in the top left of Lain) translates to:
"uren, luren, himmelturen".
The third one (in the bottom right of Lain)translates to:
"GOD IS HERE, RODENT VEIN".
The fourth one (located in fauux's PDF blog post), is the same as the first.
This morse code is rotated by 180 degrees.
It translates to: "WE ARE LOOKING FOR NEW MEMBERSサ"
Location: Lain's face.
This morse code is also rotated by 180 degrees.
It translates to: "MEMBER APPLICATION"
Location: Scrolling background.
Location: The bottom of Lain
Location: Lain's left shoulder
What the hell is Rodent Vein?