Just want to let everyone know there is a new page on service marketplace to get info on Enterprise Portal migrations. The direct link is http://service.sap.com/nw-epmig .
Here you will find general info on the EP migration process. There are also links to the migration tools and documentation.
Also don't forget about the EP migration forum on SDN for your migration related questions.
One last thing, remember maintenance on EP 5.0 ends at the end of next month (September 30, 2005). Happy migrating!