a combination of the moveto behavior and something like a hidden object (i use that trick a lot for menus and such) and smooth it out by managing time and speed... lemme check if i can whip up a quick demo...
**russtles **
Here you go... hope thisone helps.
Basically i use the hidden object to move as if a camera and scroll to it every tic.
Also im using the moveto plugin because I like it... you could do that w/o plugins too.