Googling turns up these relevant articles:

This seems to me to be the best of the lot; some great descriptive tips and links to other articles.

http://www.wilsonweb.com/articles/checklist.htm

Here's one even mentioning Y-Combinator:

http://www.scribd.com/doc/24126/How-to-market-your-website-o...

And some others:

http://blog.fairsoftware.net/2009/07/09/good-programmers-don...

http://www.wordsinarow.com/marketing.html