I really think there is a need for regular postcode updates for the UK, and probably other countries also.
We use MapPoint 2006 to find addresses by postcode heavily and find as time goes on the number of postcodes which cannot be found creeps up. This means journeys have to be dealt with manually and causes a lot of overhead.
This is the only major issue we have with MapPoint and it may force us to look elsewhere for a more frequently updated product.
GPS mapping software has the facility for map updates, so surely MapPoint should include this.