You know, I used to think that, too... but it has really become enough of a truly global community that I don't worry as much about it, anymore. When I post late at night (US time) people in Europe are just starting their day... when I post in the morning, I catch people stateside... there's always SOMEone who's awake, somewhere.

Which is not to say that scheduling wouldn't be nice... I'll sometimes write several posts at once, but want to spread them out a bit.