As someone who does not have a co-founder and has now applied for the second time I have decided I am moving to the bay area in June whether I get into YC or not and I am either going to find a co-founder to continue with or go to work at another startup while retaining my rights to the work on this project until I meet some more interesting people interested in working long hours for low pay and having lots of fun while doing it.
I cant imagine my life any other way but in a culture where I am creating every day, life is just not the same for me otherwise and working a 9 to 5 like my parents did when i was growing up has never been an option as far as I am concerned.