I've got a very similar situation here as well, except I did get an email notification.

For those that contacted coinbase support, how long did it take for them to respond? It has been 2 days since I've sent my email to them and I haven't heard anything back.

Olaf are you still around? I'm unable to send a message to you directly as my account doesn't allow it yet.

Here is how my transaction looks like: http://i.imgur.com/SCk33ii.jpg

I am starting to get worried.