Blogger Tips & Tricks walks through the process of migrating a blog to a different account (so that you can have a different profile on one of your blogs...) Simply put, create a new account, add the new account as a member on the existing blog that you want to "move", make the new user an admin, then delete the old user as a contributor. Interesting, esp. if you have multiple blogs & the one that has taken off is not the one that your profile is optimised for.
For the detailed walkthrough, see Blogger Tips & Tricks
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