I can think of better strategies for attacking the blogging market. Instead of creating a generic blogging system that just copies Wordpress' features, create the "starter" blog for a set of verticals.

Create a 'starter' blog that has the right bells and whistles for each of these individual targets:

1. A startup looking to promote their story (have it pre-set with a "About Us" page, a sidebar section to explain their product(s) and what they do, and Twitter/Like buttons to promote the posts

2. An author looking to promote his/her (e)book. Have an "About the Author" section, have excerpts/reviews on the sidebar, and a way to profile sample chapters as blog entries along with a super easy big call to action for buying the book from amazon.

3. A small business trying to attract locals. Have a clear display on the sidebar for location, maps, hours, and phone number. Have a section showing off pictures of the business. Have custom post types for Sales, Events, and special SEO sauce optimized for the given zip code.

(you get the idea...)

With an offering like this, not only will you solve a real problem (people like these having to create and customize these sites from scratch AND having to figure out what the right things to show are -- even though its well known), you 'll be solving a problem that people are willing to pay for.