You may now upload packages in the new source format to `unstable'. Packages in `stable' will continue to be in the old format.
Note that the caveats in my release announcement on debian-changes for 1.3.8 apply: * The new source tools have not been very well tested and will have bugs, some probably serious. * The source format is not entirely fixed yet. You may need to make significant changes. You _will_ need to keep up with minor documentation changes and _will_ need to make at least one further release when the format is finalised as the Standards-Version value will be changed. However, building releases is a lot easier now :-) and you don't have to re-upload the original source tarfile part of the source more than once per upstream version. I shall probably declare the new format official on Sunday. Ian.