We've just launched a new website (www.gunreal.com) and new forums (http://www.gunreal.com/forum).
Beta-Testing is almost imminent, and we'll have a video up on exactly how to test once we begin. Testing will be more structured than you're probably used to; you can play casually if you like, but we're also encouraging testers to get right into the thick of things, so you'll be able to help us hammer on specific things, post bugs on our forums, etc.