Spaces between sentences

I was always taught that when typing, two spaces should be put between the end of a sentence and the start of the next. I've met many people that have heard either way, and I've noticed that vBulletin automatically reverts any double spaces to single spaces. Anyone have any light to shed on this, or have heard (or have links) of any authoritative statements on this?

I realize most people won't care, but I'm honestly curious.

How ya doing, buddy?

Weird. So it's somehow the internet standard to have single spaces, or just *a* standard that they happen to hold to? I don't think about double spaces, they just happen by sheer habit and motion-memory. Or something.

CHz: Ah, didn't consider the HTML rendering aspect. Duh.

There's nowhere I can't reach.

My early schooling was in New Jersey, New York, and Virginia. I suppose it could be an eastern thing, but I'd be interested in seeing the spread on it, too.

This thing is sticky, and I don't like it. I don't appreciate it.

I find it interesting that those of us who consistently use the double space are so vociferous in our defense of it, while those who don't (and especially those who have never heard of it) are so adamant that it's archaic at best, and mostly idiotic. I will likely continue to use the double space for the indefinite future, as it is purely habit, but I see either way how it really doesn't make much of a difference.

I am a dolphin, do you want me on your body?