TypeMover is a plugin that adds backup, restore and migration features to a Movable Type weblog. Among a very interesting list of features is a little gem for me:
TypeMover will convert your data from it's original to the new server character encoding as needed. This is very useful when moving from an MT2 server using ISO-8859-1 into an MT3 server using UTF-8
Yes! Finally I'm going to be able to switch to UTF-8 while keeping everything in the same weblog.