I'm only halfway through this set of 13 episodes, but easily Spacey's best acting job to date, IMO.
I haven't kept up with the announcements, but I assume this is it for season one and there will be no more HOC until next year?
Probably. They've contracted for the first two seasons, so I assume the next one will be a year from now.
I think the thing I like best about that show is that it walks the thin line between politics and policy; i.e. it doesn't preach at us like other shows in this genre (Aaron Sorkin, I'm looking at you).