Apparently Google launched a new image format called WebP (weppy) yesterday. It's a lossy format similar to JPEG but with a better compression algorithm so the filesizes are actually smaller without incurring a substantial quality loss. Sounds great but the only way to create them is with their conversion tool and, I assume, the only way to view them is with Google Chrome. Thinking back on adoption rates of the PNG format for IE users I think it's safe to say that while WebP is a nice idea, it has a very long road ahead of it until there is actual proper adoption.