I have a couple of articles published in the January 2008 issue of
Electronic Musician Magazine. One article discusses some of the important keyboard commands that make using the new sequencer more efficient. Some important notes about effectively using the ReGroove Mixer, and some cool RPG-8 tricks. The other article is a sound design tutorial that shows some off the features of Combinator 2 and using Thor as a filter device. I'm not sure if these will be available online, but I'll certainly post a link up if they are made available digitally.