I have received 6 emails in the past 2 or 3 months, all purporting to be from Ebay (and looking like they are too), all saying that I need to update the information on my Ebay account or reregister or something along that line.
I was suspicious of these message for various reasons, although they usually carried the Ebay logo and various Ebay links on them.
At least one of these messages took you to a form where you were supposed to fill out all kinds of personal info like: name, address, Ebay member name, secret code, SSN, Visa #, Pin number (!), etc...
Highly suspicious...
I replied to none of them, but forwarded two of them to my local computer store. They took a look at it, and they say it's a scam.