I'd keep the Google blog, whilst (like that? I'm feeling English today!
) starting my domainblog.com. I'd do a little programming to pull the RSS from the Google blog over to the domain.
You know all about that one Linda!
Did someone say
MarketingBuzz?!
Then, yuppers ... I'd put on my SEO hat and get to working on some relevant backlinks for the domainblog.com.
I'd also post some unique content on the domainblog.com so there were no issues with duplicate content.
I'd run them both! This is what I'm doing on the
Affiliate Guild Blog these days. Does that help?