vCard & wikiengine 
I where reading Tom Limoncelli Time Management for System Administrators where he mentioned about using wikiengine as a registry for contact information. Then I started to wonder in my small round head about contact format.

vCard sounds quite natural way to save this kind of information. Which leads simply to question how hard it could be to make some notation for contact information when there is way to say this is name, this field is phone number of that previously mentioned name being and so on. If there is notation how to express something then it is quite simple to output vCard, hCard or html table etc. Contact information should be reusable from many different wiki page. I mean that if there's article about HP computer and other about HP printers contact to HP should be single HP contact object.

Unfortunately I don't have glue how code extensions to wiki. I also don't know how much there is contact information in wikipedia, most likely only some. If there would be notation for addresses, phone number etc would anyone use it. Impossible to say. There is also other side of coin. It might be that implementation of contact information notation is just what everybody needed but did not realize needing it. There is also possibility that this idea was completely stupid (actually my ideas usually are not so bright than I self think they are).
Sami Kerola