Hi Reiner,
Actually, I am doing the same and already did some considerable amount of work on the package, you can see it here[1]. Eriberto is sponsoring me, the plan was to upload it on this weekend (there's a few things that i have to finish today and tomorrow [there's a todo on the changelog]).
I already did a QA upload of this package about 6 days ago.
I really don't know what we should do now. When are you planing to finish and could you share your improvements? I will probably add png and svg support to the package as well.