Windows 7 Beta ISO Leaked

Looks like Windows 7 Beta ISO has leaked to the Internets. I do wonder if these OS "Leaks" are intentional though. I get the feeling that they are intentionally let loose on the Internets so that Apple or Microsoft can instantly get millions of QA testers for free.
Anybody going to bother with checking it out?
News via Engadget, image via Neowin.

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