Dialog screen animation concept in the myChat Android App. You can see current version at http://chat.my.com/.
See high res for more details:
— Chat screen — http://dribbble.com/shots/1429618-06-Chat-Androidapp-Dialog/attachments/210073;
— Chat participants — http://dribbble.com/shots/1429618-06-Chat-Androidapp-Dialog/attachments/210074;
Design by My.com team — http://www.behance.net/mycom.