As my English teacher almost used to say, compare and contrast the logo, branding and feel of Yell.com and Yellowikis.com.
When I did just that, I found it hard to work out how Yellow Pages could think anyone might confuse Yellowikis for Yell.com, but the BBC reports that they do. The bit that really got me:
Yell is arguing that the use of the name Yellowikis, the yellow logo used by the service and its positioning at the top left of the website “amounts to a misrepresentation which may result in third parties associating the website registered in your name with out client”.
Logo in the top left? Yell really made an innovation there…