Acronym for Simple Object Access Protocol.
A way for a computer program to call a function on a website. The usual SOAP example is quering a web server at IBM which returns (delayed) stock quotes.
This Wiki has a SOAP source letting you grab the wiki source of a webpage.
the URL is http://www.wlug.org.nz/phpwiki.php (going there with a web browser doesn't work :P), and the function is "getPage", it takes a string which is the name of the page and returns a string (of the contents of the page).
9 pages link to SOAP:
lib/main.php:944: Notice: PageInfo: Cannot find action page