Some established content syndicators and discussion platforms include DZone and JCG, my two blog syndication partners. For a content producer like me, such platforms are very interesting, as 10% of their traffic eventually reaches my blog. But there’s room for improvement with these syndicators, as their appearance is not up to date with the latest HTML5 / Frontend developments. DZone uses what appears to be a home-grown editing tool chain, whereas JCG is simply a very large wordpress blog.
Other platforms that are highly relevant but not really up to date with the latest frontend developments include Oracle’s OTN, O’Reilly’s On Java, and The Server Side

Here’s a new-comer, which you should definitely keep an eye on: Tech.Pro, combining a very lean, responsive, intuitive and modern web UI with high-quality articles and social networking. The platform feels fully integrated, something that one wants to participate in.
Not only their website, but also their newsletter is nicely done, with cute images accompanying every post.
Tech.Pro is certainly something to keep an eye on in the near future!