I have, for example, 15 goood, big quality and unique posts, articles for my future blog. Would it be better to create a blog and post all those article in one day or post one article every day? And the same about social bookmarking, for example on digg, should I add one article every day or add all of them at the same time creating almost a whole page with my posts? What do you think?
I would say space them out, daily or every other day. Like MTbiker said, you could use a couple at the launch.
Yes, I agree with the others. Do three or so to start and then add one a day. It will get the google bot there more often and help with indexing. I have the Google bot visit my one blog just about every day and I have another blog that I rarely update and it hardly ever gets a visit.