A word about e-cards: Please don't send me any. My reason is simple: I NEVER open an e-card, an e-invite, or any e-mails of that type. This method is used to spread a computer virus and anyone can send one under someone else's name. My advice to you is to do the same. Don't open any mail that requires you to open a URL to read the message - especially from someone you do not know.
In that connection - I do not have a FaceBook account and do not intend to open one. I do have a MySpace account but only have it in order to confirm the MySpace URLs of members who wish one added to their membership information. That's all its there for. I prefer TWITTER because the message size limit is 140 characters and the messages rarely require answering.
