I know some people on this forum that have the HD2 (which is the same as the Leo) and are going to make dumps of it. As for the ROM, this one is based on the Leo's touch flo (Version 2.5)
http://forum.ppcgeeks.com/showthread.php?t=86489
Keep in mind that it doesn't have landscape in TouchFlo since the HD2 doesnt have a keyboard except in Albums and Music.