Webcomic Nation is a new hosting service from Joey Manley (currently in beta testing). Manley provides lots more information in a thread at Talkaboutcomics.
In a nutshell though key features of the new service include:
(2) a newsletter service for distributing content through email.
(3) a greeting card feature to send electronic “cards.”
(4) a blog-like journal feature.
(5) a bookmark feature for readers allowing them to save their place in reading through archives.
(6) there will also be a portal for comics using the service that will promote hosted comics. (Manley has posted a work-in-progress screenshot of the portal page.)
(7) support for subscriptions and micropayment options for comics.
Other interesting innovations include ongoing renaming of comic files in system to defeat in-lining thieves.