By the way, White Shadow, you do realize that if Obama's maternal grandparents were both Jewish, that means his mom was Jewish too.
And that means that Obama is a Jew.
Now that's something that would really give the owners of the Nazi website you linked to a real hardon.
Since they don't claim that Obama is a Jew (and you know they'd love to do so), I think we can reliably ascertain that both his grandparents, nor his mother was Jewish. Couple this with the fact that Obama has never claimed his mother was Jewish (at least I've never heard him do so) and I think we can put to rest the 'Obama's mom was a Jew' rumor.
At least I hope so, the thought of Obama being a Jew is truly nauseating.