We just begin the mashup with twitter, you will just have to invite "Twitter" as a friend and then when you send "Geo  messages" (Ex: miguels @wizi)  to this friend, it will Twitt them on your profile (you will have to set your Twitter credentials off course).

 Check an example here:

 http://twitter.com/miguels

Our Twitter Bot is here:

http://twitter.com/wizibot

 Please tell us what you think about this idea?

Miguel - wizi.com/miguels

PS: Thank you Guillaume for this idea - http://webtopmania.blogspot.com/