STABLE: The newsflash scroller Advanced v1.3 for Mambo 4.5.0 [Boon] can display your newsflash items in a scrolling marquee and offers a large amount of Mammeters to control the output.  

Try the NScroller pro version here.

Additional Resources

Newsflash Scroller Advanced Mammeter List

Get this module for Mambo 4.5.1 or the Pro version for 4.5 (1.0.x)