Fredrik Wackå, a web communication advisor based in Malmö, Sweden, published in 'Your Guide to Corporate Blogging' an updated list with corporate blogs in Europe by countries.
As an example, for Germany he published the following
Ad & Breakfast Crossmedia Consulting GmbH
Andreas Orthen, Business Consultant
Abseits Partyservice & Catering
Christoph Busch Unternehmensberatung GmBH
Dirk Lotze Musikmanagement
Ferienwohnung Nahe Bingen
Gerold Braun Marketing Blog
openBLOG PR Blogger
I'm sure (and I know), there are some more corporate blogs in Germany ...
Fredric offers to mail him additions and correction. There are no comments or trackbacks on his blog and maybe, other forms of social media would be a better way to build a database / best practice database.
See the complete list
And I have a suggestion for Fredric:
Please ask companies to deliver and link on your blog presentations, whitepapers or application reports and share their success and failure.