1) Appsfire is introducing new native mobile ad formats called "sushi", "uramaki", and "sashimi" that are designed to be less intrusive than standard banners. 2) These new formats are meant to preserve the integrity of the host app and provide a more seamless advertising experience. 3) The "sashimi" format is described as the "ultimate" format, suggesting it provides the best user and publisher experience of the new native ad formats.