In the seminar session today Ralf mentioned George Siemens and Stephen Downes as e-Learning gurus.
I am writing some stuff at the moment about e-learning and mobile learning and both of these guys crossed my research quite a few times.
Siemens developed a new learning theory called connectivism. According to this theory is learning a network-building process. New knowledge is constantly combined with existing knowledge and experiences. Learning becomes a process, in which different information sources and networking joints are constantly combined.
Downes is the one who firstly came up with the term „web 2.0“. You can find the article which was the foundation of the whole development of this on his blog too, beside some other quite interesting articles.
I think both are worthy to have a look at. Here are the links: