Wha? If you've used lightbox for a while already, what do you need to look into?
:S
*re-reads original message*
Oh! So you're after something that sits in the sidebar and rotates images automatically, but can also be paused/etc?
Try this instead then:
http://jquery.malsup.com/cycle/
(
pause/resume demo ,
next/prev demo )
But stick to the basic/inoffensive transitions, or I'll find you and whack you round the head with something heavy.
:P