Ask HN: Choices for Start Blogging

I'm going to start doing some startup blogging and there seems to be basically three main choices for blogging:

1. Hosted solution - I'm thinking posterous here. 2. Installed open source solution - eg Wordpress. 3. Static page generation.

I'm somewhat interested in what the effect on SEO and traffic will be for the differing options. For example, will it be easier to drive traffic to something like posterous? Do many people use their email system to signup to blogs, can you get traffic cross-pollination from being listed on there?

How good are search engines at indexing content on Wordpress and dynamic blogging sites such as posterous? Is there any disadvantage over dumping out static pages from a script?

Thanks for any advice on the matter.