That site looks great too, but looks are subjective. :) In this case I meant "fantastic" more in the context of an early project launch. I believe a site needs to communicate its few key messages to a new visitor quickly, and clearly as well as be easily accessible from a UX perspective. Gigayo does that IMO.
No, http://culturedcode.com looks more OSX-ish. Looks like an Apple produce != fantastic design. If you want my honest opinion, both seem to be hawking products that really don't do anything new, wrapped in a Web 2.0 facade of drop shadows and shiny menu buttons. That being said, I think Gigayo's design is mostly fine, although I question what they're selling.
Let's be realistic - http://culturedcode.com looks fantastic, and http://gigayo.com does not. It is just OK.