We have a bunch of redirects in our Apache configuration. I would like to automate the testing of redirects with Selenium, which led me to some problems:
Selenium-RC has a traffic capture mode, defined as selenium.start("captureNetworkTraffic=true");
that will enable you to capture HTTP responses, including redirects and error codes.
Here is an excellent resource on how to capture and process/format this information once retrieved. It uses Python, though, but should give you a start.
For checking the URL of browser, you could use selenium.getLocation();