Jiujitsu.net is the online subscription learning site owned by black belt Dan Lukehart. It currently comprises over 600 videos with around 20-30 added monthly. Lukehart teaches most of the techniques but there are also a small number of guest instructors, such as Paulo and Joao Miyao.
There are two major selling points with jiujitsu.net: narrated competition footage analysis and the flow chart style open ended learning system.
Lukehart is possibly among the best at analyzing competition footage. His teaching style is also highly concept driven and much of the content on jiujitsu.net places emphasis on positions, transitions and flow with very little emphasis on submissions. If you enjoy both those facets to learning BJJ, then this site is well worth your time.