MrBoB and I haven't spoken about this directly but I don't see why we wouldn't tell BloB we had fertility drugs. I see it as it'll possibly make them appreciate how precious they are to us. Not that natural babies aren't precious but hopefully YKWIM.
As for telling others, I have been much more open about things now that I'm 'safely' pregnant. When talking to people that didn't know about our miscarriage/fertility problems and, for example, they ask if we want a boy or a girl, I say "Well it took us 3 years to get here so we're really not fussed about what we're having, we're just so pleased to be here".
But then, like most things, each to their own.
BoB x
P.S. I've just sent you an email BTW.