I run my team's site / forum...
We were hit with something similar if not this exact thing about 4 months ago. Had to switch providers and upgrade forum software. It's a real bastard because it gets into the webserver itself and infects other sites hosted on it. I'm not sure if anything can be done from a user standpoint, as in, I who rent space on a webserver am virtually powerless as I don't have access to the server backend. It can only hit certain webservers that have a particular vulnerability as I understand it.
Just be weary of any redirects when you try to get to a familiar site...
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