I know that blogspot blogs are automatically indexed by Google.Are there any other blogs which are automatically indexed by Google without submitting URL to Google SE or linking from other websites?Thanks in advance.
I don't know if its necessarily auto indexed, it's just that these sites have so much new info that google is constantly spidering them. Any site that has good, updated content should be getting spidered everyday and if thats the case you she see results quickly!
True, most established websites will get indexed automatically - wordpress.com, digg, etc. Digitalpoint gets indexed so often a new post here will be in google in a few minutes.
Any website can be well indexed, especially if it is based on SE friendly CMS. Try WordPress. Works fine!
A good cms helps but a link from somewhere like a forum which is crawled very often can help you rank faster.
Yes it is true that Blogspot blogs are automatically indexed. But If you don't submit your blogs to any search engines then it is not going to be indexed. Also if you don't have any links linking to your website then also it will not be indexed. Most of the blogging platforms now come with ability to get indexed by search engines so chances are your blog will be indexed.
You get indexed one of two ways> First is to submit directly to the search engine and the second is they find a backlink and follow it and then you get indexed.