I've been using Adsense for about 14months but recently heard Google now allow other contexual advertising such as YPN on the same page / site as long as they are clearly distiguished to be different via the use of different bg colours etc. So I'm gna start experimenting with YPN also, I just wen't to sign up on publisher.yahoo.com or whatever but it says you need a US social security or Tax no. to be considered? I am from the UK, where do I go to sign up as a UK resident?
i heard there was a ypn india by invitation only. also you can use omguk for ypn uk but they take a cut