"Bleeding Edge" has a number of meanings. See Bleeding Edge Title. The phrase first appears on pg. 78 "What's known as bleeding-edge technology. [...] No proven use, high risk, something only early-adoption addicts feel comfortable with."
The cover photograph is of a server farm. I found it here. It's entitled "Server Farm at Night."
More info at Bleeding Edge cover analysis
Book jacket description
Pynchon likely wrote the copy to the book jacket description of Bleeding Edge and he likely did the same for Inherent Vice.
Donald Edwin Westlake (July 12, 1933 – December 31, 2008) was an American writer, with over a hundred novels and non-fiction books to his credit. He specialized in crime fiction, especially comic capers, with an occasional foray into science fiction or other genres. He was a three-time Edgar Award winner, one of only three writers (the others are Joe Gores and William L. DeAndrea) to win Edgars in three different categories (1968, Best Novel, God Save the Mark; 1990, Best Short Story, "Too Many Crooks"; 1991, Best Motion Picture Screenplay, The Grifters). In 1993, the Mystery Writers of America named Westlake a Grand Master, the highest honor bestowed by the society. More on Wikipedia
Like Inherent Vice and Against the Day, Bleeding Edge has no dedication. Pynchon dedicated three of his earlier novels to friends and family: Mason & Dixon ("For Melanie, and for Jackson"), Vineland ("For my mother and father"), and Gravity's Rainbow ("For Richard Fariña").