I found that site by doing a search at google.com for the phrase "Man needs God like a fish needs a bicycle."

My hero!
I should be following this up in greater earnest myself, of course, but this goes to the root of whoever first came out with the like a fish needs a bicycle construction. Which is obviously of interest to all present, but myself especially.

Of course, there is the possibility that the phrase originated solely as a graffito, and no-one but Bill Posters can be held responsible. A bit like the other vaguely related phrase: as much use as an ash-tray on a motorbike.

Now someone will tell me they know who first came out with that phrase, won't they?