I've done a few batches of painting for Flames of War books this year, and here are some of my favourite items.
We also had a fun painting challenge at work. We gave ourselves the task of painting a tank from a training regiment in 12 hours. Was a fun afternnon/evening and there were some cool tanks that came out of it. The articles about it all are here (Part 1, Part 2, Part 3, and Part 4), and here are some more shots of my Ausbildungs Tiger I E.
Lastly, I pimped out a Jagdtiger for a painting guide showing some easy ways you can individualise your tank.