I've spotted a number of vehicles with custom license plates when heading to or from the office - this morning I was sat in traffic when I noticed a red VW sat just ahead of me and one lane over, the fact that the vehicle was red and a VW wasn't especially interesting, but I had a feeling the vehicle was being driven by a someone from Microsoft - the licence read “GUID” - I seem to remember hearing about Don Box having a licence plate that read IUNKNOWN, also quite funny.