in test 2, power calc is in instead of winmo calc. I have not removed the start menu, you can remove it yourself if you are so inclined. The facebook integration is for the contacts. If you go to people tab->all people, then choose a contact, and slide to the socialization tab (man with clock) you can associate with facebook under the updates heading.
sorry for the dumb question but this is the first time i installed a sense ROM (btw is awesome like all your ROMs) but i don't know about that facebook integration do i need to download the facebook tab or something?
and to my opinion the power calc is fine and the original winmo start menu is fine also
Then on the all people section you can slide over to the man with clock and see all their updates.
BTW see first post for motion sensor.