Blogging has become a (marketing) career. In writing terms, this means that blogging is a form of copywriting, and if you're already writing copy, look to providing blogging services for select clients as well.
Sarah Needleman writes: "A small but growing number of businesses are hiring people to write blogs, otherwise known as Web logs, or frequently updated online journals. Companies are looking for candidates who can write in a conversational style about timely topics that would appeal to customers, clients and potential recruits."
I'm currently blogging for Online Idea Buzz, and I'm looking for other blogging opportunities too.