I want to start a public beta for my game. how would I most effectively do this?

As the title says, I want to start a public beta. I've been developing my first game for months, and I'd like to get some feedback if at all possible.

I don't know how I should go about doing this though. I figured posting here would be the best place to find solid information. We are running severely low on funds now, but I was thinking of maybe a website.

Could I do the application here? Nothing better than finding testers at the source.

Any advice would be greatly appreciated. Thanks guys and gals.

Regards,

-Joe