To save some frustration, I'd recommend starting with the DataStax Cassandra documentation: http://www.datastax.com/docs/1.1/index

For "timeline" type data like this, I'd recommend reading these two explanations:

http://rubyscale.com/blog/2011/03/06/basic-time-series-with-...

http://www.datastax.com/dev/blog/advanced-time-series-with-c...

P.S. comments on your blog are 404ing