Clicking through to the download-page if see that the last version of the download is over one year old and it's also "just" a Release Candidate of version 1.0. There are really no news on any development.
Yes, you can find newer versions from the nightly builds, but that's not a real serious option.
Also, the "getting-started" and description-pages are sometimes not even started and some not completed.
What's the deal? Any C# 3.0 features on the way or what?
Hamilton Verissimo, the project founder, took up a position with Microsoft in August.
What happens to Castle?
That was a delicate subject to me, but surprisingly it wasn’t a problem to them. I got a written permission to keep working on Castle as much as I want. So nothing changes…
What happens to Castle Stronghold?
Albeit I was the frontman at CS, there’s a handful of talented people there. For the first time we were lucky hiring a junior developer - I couldn’t believe myself - and I’m positive the company will have a great future.
I’m going to have a small share of the company, but wont be involved anymore. Stronghold also just had a share sold to one of our clients, I’ll release details soon once it gets signed.
Hammett has recently posted about issues with .Net 3.5 SP1, so is evidently still working on it, but perhaps more from tightening things up from a MS end, than from pushing development on with Castle.
There are other developers still releasing daily builds etc, and the developer community is still very active on Google Groups, if not also on the project homepage.
First of all, the "Release candidates" are misnamed. "Milestones" might be better. All areas of Castle are still under continuous development, and as far as I know, most users use the trunk version (I do). And there are a number of very active developers working on it besides Hamilton.
There are two active Google Groups for it:
http://groups.google.com/group/castle-project-devel (for development of Castle)
http://groups.google.com/group/castle-project-users (for users of Castle)
Any C# 3.0 features on the way or what?
It's completely compatible with .Net 3.5 right now. There is currently a poll on the development newsgroup about dropping VS2005 (i.e. C#2) support and going fully C#3. (I believe it's about 20:1 in favor) Some portions of the CastleContrib already are using C#3 features.