How to move blog w/out losing standing?

I very recently exported my wordpress.com blog to a wordpress.org blog. I exported everything over, including name and look.

Now I find I cannot do a 301 redirect from the old wordpress.com blog to the new one so I left a farewell post giving the new blog url.

I also deleted the old posts from the new blog so there wouldn’t be duplicate articles and I put a link to both blogs on my website to get credit for the ranking and following the old blog already had.

All of this, however, seems crazy. Is there a better way to keep my old blog material and google standing yet change to a self-hosted blog and new url?

Thanks for all advice,
kyh