Fresh Content for Blogs everytime the same page is requested

Hi guys,

I wanted to know, what will happen if a post in blog is requested by ppl or search bots and each time the content of the post changes, will the post get indexed fast or will it have any advantage?

Lets say for example, i have a post for IronMan 2 review. And when search bots like google comes and visits, i show them a new content. And if yahoo comes and visits and i show it totally a new content different from the content shown to google. Will my post get indexed soon or will it have any advantage?

I know there are lot of SEO experts and blogging experts are here. just curious to know how search engine evaluates our content. Open to comments.

Guys any reply. Please put in ur ideas and suggestions.

your meaning is changing the post or adding a new post? because it's not the same, with the first bots will understand that your content is autogenerated and updated very frequently, with the second option bots will understand that you add new content very often (maybe too often)

i can't guess what could happen, so probably the best it just to try it and test it

the only advantage i can see is if you change the content adding something extra, simulating that your posts gets some comments or something like that, probably search engines will like this, but if you change all the post, i can't guess.....

so is it that if i get some new comments to the blog, will it appear to be unique and index faster? well the thing is, as u said, the post will change everytime it is requested cause, it ll be replaced with synonyms.. so it appears to be unique... now do u get it?