i used the solution from Setting focus to a PanoramaItem and i managed to get the result - when a button is click, it jumps to a panorama item/page. However the transition is just a disappear/appear, rather than the "sliding effect".
My question is to how am I able to have the transition with the button being pressed. Thank you in advance!
The Silverlight Toolkit includes some transitions you can use.
Read more (including examples) at http://www.windowsphonegeek.com/articles/wp7-transitions-in-depth--key-concepts-and-api
Update
Those (in the youtube link) look like the transitions created by Kevin Marshall and are also part of WP7Contrib.