I just got a message on PSN from the user "PSN-HB-request"
with the title "HOME BETA" saying the following:
"Congratulations! You have been selected as a Playstaion@Home beta tester. This message has been delivered to you for the purpose of effective feedback concerning Playstation@Home. If you are interested in receiving the beta, please reply back. Your message should include your PSN Sign-In ID (E-mail Address) and password. As soon as we get your information, we will upload Playstation@Home into your XBM.
SCEA, SCEE, SCEJ"
Be on the lookout for this message, and don't be stupid and reply back with your information. This is obviously a scam and should be ignored.