When Intel calls, Skype listens
 

The latest version of Skype's Internet-calling software can host up to 10 users on a conference call, but only if your PC has a dual-core processor from Intel, Skype and Intel announced Wednesday.

My opteron 165 on a 3-way call with no problem using Skype; will try to hook up a few more to see if only works on Intel chip.

So should AMD dual-core owners feel left out? Probably not. It's doubtful that many would be using Skype to conference with 10 anyway. And even if you would pursue the feature, I'm sure that there will be some hack/crack to enable the feature in the near future...

http://www.dailytech.com/article.aspx?newsid=685