Learn about Spider/Crawler/Bot

I have created a blog about crawler/spider/bot. Language is Perl/Python/Php, have a plane to add Java/C++ in future. If anyone is interested, can view my blog.
http://icfun.blogspot.com/

My basic posts are related to bot a site like zorpia/myspace/hi5/youtube etc site. Also If any one is interested on Perl language, can keep eye on my blog.
http://icfun.blogspot.com/