Web data scraping

I am looking for a talented internet professional that has the talents of data scraping. I am looking for an individual that can automate a simple data entry process we are now doing manually by hand. The way it is currently processed is that we look at a website page and grab that information to store in our database manually. I would like to give a detailed example of the task involved to those individuals that are interested in this project. It is very important we do not overload the server so knowledge about creating some etiquette about web crawling is appreciated.