I wrote a library which integrates Selenium into JUnit 4 infrastructure.

http://code.google.com/p/selenium4junit/

selenium4junit provides two JUnit runners (one for individual tests and one for test suites), both of which offering following features:
- configurable Selenium sessions
- test suites containing tests depending on each other
- embedded Selenium server startup
- advanced error reporting
- ability to plug in your custom error reporting / Session execution listener

selenium4junit integrates with Maven as well.