Microsoft's sticker says "VISTA CAPABLE"
which is exactly what a computer with 512MB of RAM and a graphics card without a wddm driver, pixel shader 2.0, and 128mb of ram itself is...YOU CAN INSTALL VISTA...you simply can't run Aero, which was definately explained in the fine print...that's why they have the sticker that says Premium Ready for the computers which can run home premium or ultimate...I'm not saying that the above 512MB computer will run vista well but it is CAPABLE of running it which is all the sticker said.
I enjoy a great Microsoft bashing as much as the next guy, but I hate frivolous lawsuits more than most, and the people suing Microsoft over this need to quit whining and realize that they bought the cheapest thing they could possibly run vista on, and not expect to get all the bells and whistles. YOU GET WHAT YOU PAY FOR FROM THE ODD JOB MAN