Due to the success of the original Learning Like Crazy program, the creators came out with Nivel Dos in 2006. It has been quite successful and is receiving the same positive reviews as the original. Again it is largely an audio learning format, and for reasons I stated in the first LSLC post, I think it works very well for any levels past beginner.
Learning Spanish Like Crazy Nivel Dos
The main section consists of approx 15 hours of high quality instruction divided into 30 minute lessons. This works well for me and is about the right amount of information to digest in one sitting, at least when presented in an audio format.