i received an email warning me that my account has been closed at mtgox
Dear Mt.Gox user,
Your account will be blocked for violating the rules of exchange.
The Mt.Gox team
the url point at http://www.mtgvx.tk/users/blocked
the url is a fake, but the homepage is nearly identical to MtGox official homepage.
Be careful to dont login at that fake url.
There is a similar email going around for TradeHill you can read about it on our blog: tradehillblog.com
It's a good idea to always type the address in manually if it's from a site claiming to be one of us.