YC isn't the end all and be all of your startup hopes. There's awesome accelerators like TechStars, etc. out there.
Also, you can take 37 Signal's advice that Outside money is plan B
[1] http://techcrunch.com/2011/04/08/the-seven-most-interesting-...
[2] http://blog.shedd.us/321987608/ From Steven Blank's list[3]
[3] http://steveblank.com/tools-and-blogs-for-entrepreneurs/