Megatron said:
I wouldn't read someone else's homebrew.
Like, for example, Greyhawk or Forgotten Realms?
I think a nice prepped-for-print PDF is the easiest to read, as kensenata says, on the way home from work. Small web-pages are good, especially if you're only looking at scrolling down one or two pages worth. Endless long blocks of text are for the die-hard only, I think (and I'm pretty sure I'm guilty of that with Conclave).
A few years ago I had the fantabulous idea of taking it upon myself to review online homebrew worlds. I think I did about ten beginning with 'A' before seeing sense. My experience with that, though, was that three things are important:
1) Your basic HTML/page design skills. Go read webpagesthatsuck.com. Learn.
2) Over-volume of information in one block. The web works best if you assume a short attention span on behalf of your reader.
3) Originality of the world. This is highly personal, but if you spend a lot of time checking out homebrew worlds you get very bored, very quickly, of yet another vanilla fantasy setting (or worse, a cheap version of a Midnightesque, bady guys won setting - oo, we're so dark, look, we've got red text on a black background :\ )
Something I've done with Conclave (mainly on PC races so far, but I may take it further) is for short web page entries with an associated PDF for more details. If you have the whole thing on PDF but little/no web content (Aretis D'Arghe and Bostonia went this direction, poor decision IMO), why would someone download your PDF?