Products like UserTesting.com offer remote, unmoderated usability testing where they get people from their list of qualified test participants. It's a quick, easy way to get usability feedback without having to recruit.

Pros:

• You get feedback within an hour or two without having to do any recruiting.

Cons:

• This sort of testing is best for things like usability tasks, rather than for complicated customer development where you need to be hands on with the participant.
• When these companies do the recruiting, they draw from a large panel of people who test for them on a regular basis, which can get you a slightly skewed set of participants who spend a lot of time doing usability studies.