I receieved one of these the other day and my friend also told me of an email he got that said he received an invite to runescape 3 beta and that to email them his account details so they can upgrade it.. His was obviously a scam but the email I got was actually very realistic. The only thing that gave it away was a small typo. Even the senders email was real: [email protected]
There seems to be alot of these going around.. Try and steer clear