I got this is my e-mail this morning. I think it is a fake immunity tool offer that contains the Klez. I got the same message from two different people, and Norton Anti-virus alerted on both of them.
///////////////////////////////////E-mail message/////////////////////////////////////////////////////////////////

Klez.E is the most common world-wide spreading worm.It's very dangerous by corrupting your files.
Because of its very smart stealth and anti-anti-virus technic,most common AV software can't detect or clean it.
We developed this free immunity tool to defeat the malicious virus.
You only need to run this tool once,and then Klez will never come into your PC.
NOTE: Because this tool acts as a fake Klez to fool the real worm,some AV monitor maybe cry when you run it.
If so,Ignore the warning,and select 'continue'.
If you have any question,please mail to me.
/////////////////////////////////////////////////////End of E-mail//////////////////////////////////////////////////

I think this is a fake for these reasons:

1)I got it from two different addresses.
2)Reputable companies don't send out free tools in e-mail.

I know this wouldn't fool any older hands, but I thought I would post in just in case someone didn't know any better.

They say, "If so, ignore the warning, and select 'continue.'

Yeah, right. And then you'll no doubt try to sell me the Brooklyn Bridge.