I spent too much time this morning (considering neither Dunn nor Kalis seem to have any real chance at coming to ND) looking for anything on Dunn officially decommiting, and like you found nothing. It is notable that almost everyone on OSU recruiting sites no longer consider him a commit, but there is nothing from Dunn or any other reliable source as of now. Again, the only recent "info" is the Dave Biddle "scoop" on Bucknuts. Who knows, but it seems like it is only a matter of time (several sites reference a possible official decommit within the week).
Kalis, on the other hand, has officially decommited, and could be a Michigan verbal this weekend. There are a lot of rumors he has already committed, but again, we should wait until a reliable report surfaces. He is very close with Strobel, and posters on Michigan boards that claim to be close to the decision state he friended dozens of Michigan players on Facebook and believe be will be committed Saturday.