As of 6/25/2008 it appears that this api is no longer available.
From their site: Blogwise is a site about developing a portal to blogs around the world, efficiently, quickly and nicely. This API is provided to allow blog hosts and platform developers to submit multiple blogs via an automated scripting process.
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There are no mashups, developers or code associated with this API yet.
This API is no longer alive
This is no longer up and running