Not sure why SEOs and other tech bloggers lately "freak out" about the "Wiki jacking". It's a common and definitely old trick to use trusted domains in order to mess up the Google SERPs. Besides Wiki there is: - Youtube or any other of Google's vertical Portals
- Linkedin / Xing
- Wordpress / Blogspot / Blogger or any other trusted blog software
- A million other sites, that allow you to create a personal page (universities, myspace, high5....)
I don't want to call SEO dead, but I kind of agree with Marshall over at Webmetricsguru. It's time to get new faces on the podium.