This is an excellent site. Mainly of interest because of its description of the novels as well as the live action movie. The webmaster is also interested in creating a subtitled version of the Boogiepop live action movie.
Recently updated for the last time. Merits a visit as it has portions of Ogata's art book available.
Oldest english language Boogiepop site. Has not been updated in a good long while.
Another Boogiepop timeline, in-depth and relatively accurate.
A Boogiepop novel translation project. Not much yet, but there is hope.
Translation of the Boogiepop in the Mirror prologue.
These are probably Boogiepop fanfics.
A small Boogiepop fan community.