The Bug is critical i can not imagine what will happen.only thing i will suggest is patch your softwares now.
here is link to a snort signature.please note that the signature is high load signature.please keep this in mind.
on the other side i was thinking about how it will be exploited in near future:
1)BOTS : yes bots,they will poision various DNS servers and then divert you to the site which hosts malicious codes.may be some activex exploit,media files exploit,adobe flash one.
2)PHISHING: people will poision your DNS server and create fake paypal or banking site.when you open paypal.com,fake site will open as dns is already poisioned.so someone can steal your data easily.
3)kiddies:they will poision some servers and will have fun.
4)viagra and other spams:you will open google.com and what you will see it cheap viagra ads.not fun at all.
thats what i can think at this moment.let me know if you know other?
thanks for the info :)