Got my upgrade to Froyo this morning. So far working good, I did a wipe and now working on restoring stuff.
Change so far is that a lot of features (contacts, screen lock), look like my old Moment's did. Doesn't look like live wallpapers either, no big deal for me. And of course, move apps to SD Card.
Now I need a bigger SD Card.
You can go into settings / Applications / Manage Applications.
When you click on each app you have an option to move to SD if they app allows it. Good idea too is every so often choose to clean each cache too.