What is the idea behind a very simple blog engine. For example, something like, an external website can index automatically the latest posts of the blogs?
A user creates a post which is sumbitted to a mysql database along with the date and author's name. The index (or wherever the posts are displayed) gets the date and selects the post from the database where the date and author is equal to the post's date and author. I rescently created my own, unique blogging system...so let me know if you need anymore help.
may be you didnt understand, i mean, something like technorati, which links to the External blog posts.
You might be asking to populate your own blog with posts from other sites, gradually being updated when posted on other site. If yes, then most utilize RSS and ATOM feed from other sites, and some also save it to database. I wrote a PHP API for Yahoo Answers, whih did the same thing, dug out new posts and did populate a forum not a blog. Such custom blog script is not a big deal. JLEville says that s/he has already wrote one blog. If this is all your requirement JLEville will just have to integrate RSSS feed from other site and se ta cron job on server that will fetch feeds time to time. I cannot engage myself in your work rightnow, becuase am already into another project. regards