Screen-scraping

Philipp Lenssen, the developer of Google Meta search engine FindForward, writes on screen-scraping With PHP5. FindForward can handle basic and advanced google search syntax and even get you results in RSS. Also Philipp has some advice on screen design (or generally designing the structure of your website or evaluation a site).

Here´s another article on scraping almost any website (and getting it into a RSS feed) with the help of tools such as Regex (via smi) and using groups in regular expressions (gets heavy; more and a tool).