The SD15 is not yet released. This page will be updated as soon as the camera is final and I get information about any changes between the mount of the SD14 and the SD15..

As the SD15 will roughly be a SD14 with a new internal processor and just a few changes to the user interface, I guess that there will be no changes to to the mount. If this is true, everything written on the Non-Sigma lenses - SD14 page will be valid.