Feedback from VCs/Epxpert would be an interesting perspective. However struggling startups would probably be more interested in hearing from potential users.
Shameless pitch:
We, at StartUpLift.com, are trying to build a very cost-effective (and often free) way of letting startups get feedback from users. Here are some examples of some great feedback received by offering small incentives to top feedback providers: [Ninja Post - Offered $5 each to top 3 feedback providers]: http://startuplift.com/ninja-post-forum-software-for-a-web-2... [Tom's planner - Offered $5 each to top 10 feedback providers]: http://startuplift.com/toms-planner-surprisingly-easy-projec...