NoQL space
These days I'm heavily looking into the NoSQL space, and I've currently limited my learning to the document space of CouchDB, MongoDB, key/value space of AWS SimpleDB and Cassandra, and the Neo4J graph space. For the projects I'm involved in I'm most excited about Couch & Mongo, even though I'd love to host it in the AWS space and therefore should be looking at SimpleDB.
If you're exploring this space as well, I'd love to hear from you and your thoughts. Many more posts are bound to come