Is there any script that can make post on a blog from RSS feed.
I heard it on a forum but forget about it..

For which blog system you want this done ?

I think wordpress is better for this...

Then in that case, the following articles can help you, hopefully :

1) How to use RSS Feeds on your Wordpress Site | .: ShaolinTiger - Kung-Fu Geekery :.

2) rawlinson - us » Blog Archive » feedList Plugin

3) WordPress on AutoPilot - Automatic Posting Google Reader to WordPress » Chimp-Simple Publishing

Thanx,
Shadab.

Thanks bro....
I was looing for it...

Is there any such system for drupal ? If yes,plz tell me.

I never saw this for drupal.
But wordpress is working fine (i am not using it this time)