IGNORE and DELETE this message right away.
Here is the body of one of these messages (Any active links in the messages have been disabled):
Dear AIM user,
Your AIM account is flagged as inactive. Within the following 72 hours it’ll be deleted from the system.
If you plan to use this account in the future, you have to download and launch the latest update for the AIM. This update is critical.
In order to install the update use the following link. This link is generated exclusively for your account and is available within a certain period of time. As soon as this link is not available anymore you will get another letter.
Thank you,
AIM Service Team
This e-mail has been sent from an e-mail address that is not monitored. Please do not reply to this message. We are unable to respond to any replies.
A quick peek at the message source shows that clicking on the contained link to download will actually hook you with update.aol.com.hasdxzzw.im. The key part here is hasdxzzw.im - this is a domain supposedly registered through a registrar on the Isle of Man. Highly unlikely that they have anything to do with AOL or AIM.
For the record, the proper link to download valid AIM software is http://products.aim.com/windows.
Surf Safe!