fischermx - 12:49 am on Aug 4, 2005 (gmt 0)

I'm going to sound stupid but here I go :
This is YPN, Yahoo "Publisher" Network and for the tone of the thread I get this is the Adsense-like program.
Now, if I want to be an advertiser for this, pay for ads showing my site, wheres is the Yahoo's Adwords-like program? Where do I signup?
Is that invite only, too?