I certainly think that Buzzword is an amazing Rich Internet Application and according to Adobe's PR, "How will Buzzword be integrated with Adobe's other online document services? Buzzword will integrate with Adobe's document services in stages. The first step is to extend support for PDF output and gradually integrate with future releases of Acrobat Connect, Create Adobe PDF Online, and Adobe Document Center."
I would however like to see this as Flex 3 component, potentially even for purchase to integrate with Flex apps. Frankly, it would make one of the best Rich Text Editors out there. They do need to recoup their investment, but could share the RIA Flex technology wealth by charging for the component.