Interesting article here on Intelligent Enterprise from Seth Grimes on how SQLStream and Mondrian can be used together for real-time OLAP analysis on Twitter feeds:
More on the technical side of this from Julian Hyde’s blog earlier this year:
I’m still not convinced there’s much of a market out there for real-time OLAP (as opposed to real-time BI); after all, how many people out there are actually using pro-active caching with Analysis Services? The kind of analysis you do with an OLAP tool, looking at high-level trends in aggregated data, seems to me to be the complete opposite of BI scenarios where you need to be able to respond instantly to certain events. But maybe I’ve just not come across the right business scenarios yet.