Lovely. This is an almost amusingly simple attack. There's a lot of doom and fear in the article, but I figure they'll find fixes soon enough. Just be careful where y'all are surfing for awhile.
Here's some other highlights:
By taking advantage of the way that browsers, specifically Internet Explorer, handle active scripting and .NET objects, the pair have been able to load essentially whatever content they want into a location of their choice on a user's machine.
Researchers who have read the paper that Dowd and Sotirov wrote on the techniques say their work is a major breakthrough and there is little that Microsoft can do to address the problems. The attacks themselves are not based on any new vulnerabilities in IE or Vista, but instead take advantage of Vista's fundamental architecture and the ways in which Microsoft chose to protect it.