And my answer was to wait for 3 or more months to see if blog has been removed from deleted list and also if URL is available to others to claim for their own:
Let me test my answer. I am going to delete this blog Guang Zhou Kitchen today from another account and let us check in 3 or more months time if the blog has been removed from the list of blogs.
Update:the result as of today 6/4/2012, that is, more than 3 months after deletion, that blog is still in the deleted blog list and can still be undeleted. Will check again later.
Update 19 April 2012: Forgot to save under which Blogger account was this Guang Zhou Kitchen was created/listed so so redoing this test today by deleting Mapdoo Malaysia. This blog was created/listed in my main Blogger account.