Microsoft has released it's own tagging tihnggie, it can be downloaded from here:
http://gettag.mobi/
and to create tags you have to register here:
http://tag.microsoft.com/ (a hotmail account will do)
it supports text, links and vcards and has a much smaller size than the other types of tags, so it can easily fit on a business card. one nice thing is that you can also password protect your tag, so when someone scans the tag, he then needs to insert a password to be able to read it. you can also make the tag valid only for a certain period of time, with start and end dates.
here's an example tag for a vcard:
and here's an example for a password protected text, the password is lebgeeks:
btw, should all these posts about the tagging thing be moved to another thread?
[edit]i just realized that the quality of my jpegs was quiet bad, so it might require you to get the closer much closer than usual to decode the tag. when the tag is in good quality, the detection of the tag and its decoding happens almost as soon as it gets in the camera range.[/edit]
