Also don't be afraid of being persistent in getting feedback on your existing ideas, even if you are a solo founder.
It's probably next to impossible to get early feedback on a YC application but there's now one more way to turn impossible to possible: http://lookapinky.com
just checked and saw that you added "because" has this changed the user behavior in any way? No worries about helping me back. Just keep creating and doing awesome things. The more people that do that the better for everyone else.
To make it easier to ask for favors - it would be helpful to know whom to ask for favors as well as what specifically to ask. The issue with making it more socially acceptable is that people normally go to the "experts" for very easy favors so they get lots of requests and people with slightly less knowledge might get less request.
Here's an idea - have me tell you what the request entails (programming, personal finance, love, money, etc) and then search through the meetup api of groups that have those key words in them. Now you return to me a list of people on meetup who belong to groups that contain people I could request a favor from. As long as it's in their interest area and you help me write a nice email, you can get me started.
http://lookapinky.com