Graphicly just launched a blog for digital comics creation that is designed for creators to share advice and experience on being successful with digital comics. The initial posts look promising (including one from Mike Jasper of In Maps & Legends).
Graphicly Resources
Jason Brubaker, creator of reMIND, just moved all his making comic posts and information to a new blog, call Making Comics. Other creators will be sharing advice as well. The resources page on this site are a wealth of information for digital and print. Not all comic creation posts from the reMINDblog have been moved over yet, so its worth checking out older posts on the former blog as well.
Making Comics
reMINDblog