As many sites report a French blog portal (part of the Microsoft site) was hacked by a Turkish hacking group. As stated in this article it could be, that there is a security flaw in IIS 6.0 on Windows Server 2003. This could lead to another worm which would have a very big impact on the internet. (Netcraft says, that the number of Apache runned sites is declining in favour of IIS.)
Let us hope that this is not the case. Microsoft said in a statement, that the hack was possible because of a misconfiguration in a third party hosting center.