The announcement about Version 2.0 of Blackhole appeared on the Russian-language website Malware don't need Coffee.
I've had a couple of Russian domain specific email's in the past few days, I wonder if it is related? Not that I try out the links for free medicines.

One seemed a definite bot
imbdubvsqcs.kdjs8ltidnkg.es6drhl3ag.net
wreb.ru
That one was from Monday, our time.