Testbirds currently has a group of over 50,000 testers who will put your mobile apps through its paces and provide back to you a full report with their testing results. Typically a test involves 25-50 testers looking at a specific problem, the company started hearing from customers who wanted to be able test across a much richer variety of possible scenarios which is what prompted the updates now providing tests against a number of variables including type and version of browser, operating system, Flash and Java, along with several other variables. Check out the full details here.