We also secured a small seed round of funding ---enough to last us a few months.
How do you deal with the loss of flexibility once launching? You really can't make big architectural changes after launching in some cases. I.e., when were you confident enough that it was a good time to launch?
So, for example, instead of writing/installing/debugging a shopping cart, we just posted Google Checkout buttons. Instead of creating a database backend for orders, we have the form submit to email. Instead of creating the most beautiful website with the best copy, we made something that looked OK and populated it with some basic content.