Hi folks
Carlos - it looks like you got screwed by Quechup.
For those of you who don't know about it: I've only read about it - not experienced it first hand, but it seems that this social networking site, as soon as you join, sends an invitation (from you!) to your entire address book without asking. People have had their email accounts shut down for spamming because of this.
I first read about it here: http://www.boingboing.net/2007/09/04/quechup-is-rotten-do.html
Joining is an innocent act - as far as I can tell it's just a crooked organization.
cheers dafydd