The UK TeX Users' Group's FAQ Page is searchable and up-to-date.
LaTeXe help 1.4 is available from Emory Univ.
TeX4ht: TeX and LaTeX for Hypertext is available from Ohio State.
Hypertext information similar to the current set of files also originated from VMS help files.
Aspects of publishing with TeX and LaTeX is an introduction to the philosophy of TeX and LaTeX.
Text Processing Using LaTeX from Cambridge Univ. Engineering Dept. includes excellent beginning and advanced hypertext manuals as well as information in other formats.
Macintosh users will want to take a look at Gary Gray's TeX/LaTeX Software for the Macintosh, with pointers to many tools for dealing with LaTeX and what's new listings.
For those with less experience with LaTeX, good introductory material includes:
The (La)TeX navigator from LORIA in France is an excellent source of documentation and pointers to other resources. The site is also in available in English and Deutsch.
Lots of documentation, mostly PostScript, is available from King Lee at Cal State-Bakersfield.
TeX and Friends, from UCLA, is mostly (compressed) PostScript files.
Tex-related documents from Cambridge Univ.; includes TeX Users Group newsletter and many documents (mostly in dvi format).
The Usenet newsgroup comp.text.tex can be a good source of information and help (but read the FAQ before posting).
Of course, there's always Yahoo.