We have an internet portal with approximately 85000 members. We have nearly 30000 daily unique visitors and have a database on mysql.
We'd like to offer our members a blog servive, in which they could express themselves more freely. This blog site will be a subdomain like blog.ourdomain.com.
And the members who wants to have blog pages will have a meaningful web address. Their blog page and their profile in the existing portal should be linked.
The design of the blog service should suit with the existing web site.