Here are reference links from my presentation, “A Tale of Two Services”

NoSQL-related:

Windows Azure Table Service
Amazon Web Services SimpleDB
Oracle Berkely DB
Redis
MemcacheDB
Hibari
Project Voldemort
Riak
GT.M
Apache CouchDB
MongoDb
Raven DB
Google Bigtable
Apache Cassandra
Hypertable
Microsoft Dryad
Neo4j
“NoSQL Distilled” by Sadalage & Fowler

mongoDB – related:

mongodb.org
10gen.com
mongovue.com
MSDN March 2010
Hanselman’s Blog Post
Nielsen’s Blog Post
Mahugh’s Blog Post

Neo4j – related:

Neo4j.org
Using A Graph Database to Power the “Web of Things”
Cypher “Cheat Sheet”
Neo4j in a .NET World – Tatham Oddie

ASP.Net Web API – related:

For Visual Studio 2010: http://www.asp.net/web-api
Getting-started lessons: http://www.asp.net/web-api/videos/getting-started