Quechup is a new spam site disguised as a social network. When you join up, they ask for your address book. Then they send invite emails to every address in your address book.
If you receive a Quechup "invite" from a friend, I suggest you ignore it. I've received a couple of them... and was saved from joining only because the main thing that I saw when I googled [quechup] was a lot of apologies from people who discovered that they had spammed all of their electronic acquaintances.
Labels: arrr, identity theft, social networks