How to ping yahoo and others?

[Pornopat]

So I finally started a blog last week. I am the last person on earth right?

Now I am kind of lost with pinging yahoo (first SE I am trying to ping).
I understand I need to make a "my yahoo" page and that I need to add my blogspot to the content. Ok I managed to do that.
Then I am supposed to ping yahoo and the my yahoo page should be updated right away. That is how I understand it is supposed to be.
If I ping using something like this :
http://api.my.yahoo.com/rss/ping?u=h...x.blogspot.com
where xxx is the name of my blog I see weird signs. Clubs and spades...that kinds of signals....If I check my yahoo page nothing is changed untill like 12 hours after (normal update?)
I tried services like pingomatic but without result as well.
I feel like I am overlooking something but what????