Checking out Rollyo & Jotlive right now. I liked Jotlive very much. it is basically an easy to use free wiki which allows multiple users. Another interesting bit about it is that it is built using RoR 🙂
But I am trying to figure out what Rollyo is about, trying to understand the implications of Searchrolls ! Seth thinks they are cool & are early web 2.0 stuff !
mtrajan.com 
Rollyo, as I understood it, is basically a yahoo search maker for more than 1 site.