I have been thinking of ways to promote our enterprise wiki, particularly to new groups who have not been using wiki systems before. One thing I have been trying to do is to sell the concept that the wiki portal can act as a central knowledge repository that we can all benefit from. We called it 'OnePlace', to symbolise this idea "...find all your answers in One Place!".
Then, in a slide show I was putting together, it came to me that if I want to promote this as a great source of knowledge within the organisation, why not promote it using a business card. Now if teams say "where will we find information about xxxx", they can check OnePlace!
I have yet to 'test' this idea, but I think I will include it in any presentations I give internally as my closing slide......"Now the important contact you need is OnePlace"