I just checked my mails and verified that I never received this mail. As a result of how things appeared to me, I got the wrong impression that there is not a big interest in the N900/Maemo any more. It was only until Earthwings suggested by chance to ask for help in the #maemo channel for getting this thing rolling again. But in the end, I'm happy to have uploaded a new version of Marble successfully with the help of the Maemo community, esp joerg_rw.