I currently work for IBM doing this exact sort of thing. Its called PowerHA pureScale (used by DB2). Cluster application service providing, for shared data and network data concurrency.<p>Its actually a pretty cool technology and I can imagine that similar solutions will enter the market soon. Clustered applications is the next thing until we break past the physical wall on processing power and speed.<p>But also, who knows. Maybe clustering will be to data processing like SOA and web services were to web apps. Doubt it though.