Not sure if this is the correct fourm, but what font is used on gr.am?
Since that site really isn't up and running yet and the only thing they've released is the logo on their main page, there really isn't a font to point you to yet.
Also, it very likely may not be an actual font; it may be 100% designed instead. Many logos are made to order in vector without requiring a font foundry to construct an entire font.
Per the CSS they will be using Prelude as their font. Of course, as said above, the logo is likely designed.
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