This is the email I received. Only one.
Dear Sir or Madam,
A few hours ago the Bitcoin trading website Mt Gox has been hacked. Malicious individuals have been able to obtain a database containing usernames, email address and encrypted passwords. This information has been posted publicly on the internet.
As a Bitcoin supporter I'm now sending a message to every email address contained in the hacked database. This is to warn you that your username, email address and password have been leaked. I therefore strongly advice you to change your passwords. If you have used the same password on different websites it's highly recommended to change your password on all of your accounts!
For a more secure alternative to Mt Gox, the community appears to be moving to TradeHill. So this is no reason to lose faith in Bitcoin itself. It must be seen as a warning that not every website can be trusted with your data however! Their link is
http://www.tradehill.com/?r=TH-R15683 (Note: You can remove the Referral Code when registering if you want!) This is certainly not the only website where you can exchange Bitcoins, also check out
http://www.thebitcoinlist.com/dp_bitcoin/bitcoin-exchange/Sincerely,
It doesn't seem that bad. He mentions exchanges other than Tradehill and you don't HAVE to click his link. Actually I think it could be quite informative to traders who don't follow the forums or know of any other exchanges.