As for the gap year - wow, that could be a really good idea. I had considered that option, but I guess I didn't think about it enough. The lack of co-founders and money could pose problems in certain areas, but I could either just keep pushing the web app I've been developing to commercial release, or go to work at someone else's startup. Do those sound like potentially good ideas? (I can probably even defer enrollment to a college to have a safety net in case rejections round two comes around)
Also, what did you learn during your gap year, more specifically? (if it's not entirely specific to your case)
Thanks for the insight; I have a lot more thinking to do, but taking a gap year could be a very good option for me.
Edit: Posted before I saw your comment, fuzzmeister; that's probably a good way to have my cake and eat it too, although the downside is that I won't exactly be motivated to succeed with the startup no matter what if I have a spot at a college waiting for me.