Overheard our officemates talking about this.

Quoted: ScaleOut Software provides powerful distributed caching for enterprise ASP.Net applications running in server farm or grid computing environments.

Nice, I've thought in the past that having something like this would be useful. Memcache is good, but it is in-memory only.

Quoted: Dynamo is internal technology developed at Amazon to address the need for an incrementally scalable, highly-available key-value storage system. The technology is designed to give its users the ability to trade-off cost, consistency, durability and performance, while maintaining high-availability.

This is a .Net client for memcached that uses consistent hashing.

Quoted: The main reason I created this is that I was not comfortable with the the current memchaced client (which is just a ported version of some Java client).
...
So, after some hacking Enyim Memcached client was born:
...
Uses consistent hashing for keys: an specific item goes every time to a specific server. (Based on libketama.)

Quoted: You can think of memcached as a giant hash table that can run on multiple servers which automatically handles maintaining the balance of objects hashed to each server and transparently fetches/removes objects from over the network if they aren't on the same machine that is accessing an object in the hash table. Although this sounds fairly simple, there is a lot of grunt work in building a distributed object cache which handles data partitioning across multiple servers and hides the distributed nature of the application from the developer. memcached is a well integrated into the typical LAMP stack and is used by a surprising number of high traffic websites including Slashdot, Facebook, Digg, Flickr and Wikipedia.