I'm actually interested in this myself. Just got my MCSA for SQL Server 2012 today and want to move on to the MCSE (BI Edition). There don't appear to be any training kits available from Microsoft at the moment. So can somebody please tell me:

1) Is there a target date for when the training kits for 70-466 and 70-467 will be released? If nobody knows, do you know a contact at Microsoft from whom I can inquire this?

2) If Microsoft isn't planning on releasing the training kits, is there any third party that will or that will at least give some preparation for this exam? No course though, my employer is not willing to dish out 2.000 + Euros for this.

3) Can anybody at least recommend any book(s) for this exam?

I'm not willing to write these exams without any prior preparation since if I am to ask my employer to sponsor me, I want to be sure that I can provide results.