How do spiders work?  Also what and how can you scrape data using
spiders?  Are theses two programs a good example of what spiders can
do?  http://www.velocityscape.com &
http://www.questronixsoftware.com/products/nettoolsspider/nettoolsspider.aspx

If you write a tutorial that could teach a child to use this
technology a tip of $25 will be included.

Check out this Wikipedia entry:

http://en.wikipedia.org/wiki/Web_spider

Spiders are often used for mirroring, indexing, and automated web site
maintainence (i.e. checking for broken links).

Scraping is something different. Much of time when scraping data it is
not necessary to traverse all te links pages to get the data you want
to scrape.