Funny you bring this and David Allen up. I played Horizons for about a year and despite performance issues and lack of content, I enjoyed their world events (freeing of cities from the control of undead, etc.), the ability to multi-class/hybrid class in a level-based environment as well as learn multiple tradeskill professions (although the grind was painful) and the idea of a non-human race (dragons). Also, before forgetting it, the speed bonus from staying on a road
On the down side, while I'm interested in seeing what features come up, the website looks like something for the sight-impaired, and the screenshots and UI look like wow-cloned shit (yes I know, early in development, beta, etc., they still look awful).
EDIT: Yeah, Draegan, thought the same thing, esp. with the UI: "Westfall by braille."