ChangKi Kim started a meta blog site about a few months ago.
If you want to have your blog content collected at his meta blog, you can ask him to do so. ( Can they, Mr. Kim? )
From yesterday, he started to support BBS. So, you can post questions, something to discuss, jokes about Obj-C and Cocoa, and so on.
Here is the link.
It is hosted in S. Korea. However, I believe your blogs can be collected even though you write in English. :)
If you are experienced Cocoa/Objective-C programmer and Koreans, I encourage you to use his site.