One suggestions that has worked EXTREMELY well for us over at blog.SU has been establishing a 'Question of the WeekQuestion of the Week' blog post were we focus on the details of a really good question/answer. We ask a questions each week on Meta for user to nominate other user's questions or answers. This may be something that you may want to start up. It's great because it allows for more fluid involvement from the community without exactly asking them to blog about things.
Also, with the recent activities of multiple hacker groups, you might consider collecting together suggestions/tips for users to ironclad their:
- Home Networks
- Servers (esp from SQL injections)
- other types of preventative measures of protection
Congrats on getting approved for the blog, and best wishes to you all! Let us blog.SU'ers know if there's anything we can do to help.