Other tutorials can be found at the following links:
Security Ninja's tutorials on Burp Suite are very comprehensive and easy to follow, http://www.securityninja.co.uk/?s=Burp+Suite.
The Automating SQL Injection with Burp, Sqlmap, and GDS Burp API article, http://milo2012.wordpress.com/2012/06/26/automating-sql-injection-with-burp-sqlmap-and-gds-burp-api/. sqlmap is the go-to tool for detecting and exploiting SQL injection. It is free and open source, and using Burp Suite with sqlmap is a brilliant idea. Find possible SQL injections with Burp Suite, and then pass them on to sqlmap for further analysis and attack.
The Adding Anti-CSRF Support to Burp Suite Intruder blog post, http://blog.spiderlabs.com/2012/09/adding-anti-csrf-support-to-burp-suite-intruder.html. This particular blog post explains a real-world scenario, wherein using the Extender tool, we can supercharge the features of Burp Suite. The language is simple and the code is...