I just made the move from blogger to (self-hosted) Wordpress the other day, and so far i love it. I want to change my permalink structure to something that looks a little better - if i change the permalink structure in Options|Permalinks, will all my existing URLs change?
Yes all links are changed automatically, unless you manually added some links in the sidebar or somewhere.
yes all will change but you can make them similar to blogspot type urls .. change the permalink url appropriately and add .html in the end ..this way all the urls will remain the same ..