JMeter is pretty sweet. Figured out how to record a test case through the browser (via proxy), automatically replacing configurable items with variables (for host, port, username, etc.) - I liked that.

In the process of recording some test cases right now, that can be run during integration (pre-production), just for basic functionality (not load-testing).

I even wrote a proxy-configuration file (first time), so the JMeter proxy is only used for 'localhost'.