WordPress MU

Hello there..
Im runnig a site with 10+ blogs direkted from at frontpage i have designed in GOLIVE..
My question is..
Is it possible for me to have some plugin that will show who have mad a new post within the last 24 hours?
can it be shown graphical insted as a list (rss feed)???

http://mu.wordpress.org/forums/search.php

Cool the thing is that i don't know what word i sould serch for

The title of your thread would be a good start.