I was born in England (no worries Bill, my Grandad was from Fife) and this was never ever discussed there as far as I know. I have always used one space after what we call a full-stop.
I have a couple of questions though:
1. If hyperlinks shouldn't be underlined (except per hover), which emphasis can be used in your opinion? Italic destroys small fonts, bold, as someone said (I think Bill) destroys the "whole picture" and using different colours can be too subtle sometimes and also destroy the flow.
2. This is something I have never been sure of.
If I write "...he danced quite often...according to his brother, he was seventeen at the time..." - how do I use the "..."; should I have a space before or after the "..."?