Why google stop indexing my or your blog posts? Simply the answer is, because Google does not like your blog. So to make Google index your site blog post faster, just simply make blog that Google love. What kind of blog, dude?
Just blog like i am blogging, unique content (check our posts before 1 April 2010) and regularly.
Below is screen shot which showing my page/post website being indexed by Google in 5 minutes (Sometimes it take 2 hours or more).