I came across this blog post on Jungsonn Studio's blog the other day where they demonstrate how Google Adsense is vulnerable to a type of cross-site scripting attack that when the suspect javascript code is executed and you visit your Adsense account in another browser tab, they are able to switch your Adsense account over to them.  Pretty interesting find, and it really makes you think about all the times that you authenticate into a variety of different sites within different browser tabs all the while having done lots of surfing of other pages (of which you don't know that you can trust).  It's definitely something that all of the bloggers out there that use Google Adsense should be thinking about when they pop into their account from a browser tab

Shawn