For more background info on what's holding back NOSQL in the enterprise and why we raised $10M+, feel free to check out this post:<p><a href="http://blogs.neotechnology.com/emil/2011/09/nosql-the-web-and-the-enterprise.html" rel="nofollow">http://blogs.neotechnology.com/emil/2011/09/nosql-the-web-an...</a>
I've been using neo4j for a while now for a new project and i'm very impressed so far - especially if you have typical graph problems to solve (social networks?). I especially like the fact that it's ACID compliant and has an embedded lucene search to solve non-traversal type queries. Good for them that they raised some cash to further develop their product.<p>Their beta module on Heroku is another win win for me :)
not only does this prove an upward moving trend in NOSQL databases, but that neo4j is ahead of the curve. I know some of the guys behind Neo4j, and they work harder than anyone to make sure the database is stable, reliable, and all around kick-ass.