If you have scheduled future updates be aware that currently, all updates will be pinged at the time of scheduling. This could result in say 30 pings at once. Some operations may frown on this : ( So be aware.

That is taken from here.

The behavior you described is what I believe Typepad does. Even if Wordpress doesn’t handle future ping, you can get around it with Feedburner. Feedburner will ping several of the main services when it notices a new post on your site. So if you are using a version of Wordpress that doesn’t support the future pinging, just sign up for Feedburner.

I wouldn’t worry too much about the ping services though. Do you know anyone who actually uses them to find stuff to read? They were more important before feed readers were around and when there were only about 50 active blogs on the internet.

One question for you about weekly posts. I see that you use Wordpress like many other bloggers. I always understood that scheduling posts in advance to appear on your blog once a week automatically may seem like a good idea and is also perfectly possible with Wordpress, but that the major disadvantage was that blog pinging services get pinged too soon. That is, not when your post appears on the blog once a week, every week, but when you write and publish the whole bunch of them. How do you deal with this?