AFAIK Opera supports WebM, I assume they wouldn't have problem doing the same with WebP. IE and Safari might be a different story though, they wouldn't be so ke

AFAIK Opera supports WebM, I assume they wouldn't have problem doing the same with WebP. IE and Safari might be a different story though, they wouldn't be so keen to support a format from their big competitor. If I would be in MS' shoes I would use that as an occasion to put a support for JPEG XR into Chrome/WebKit.