"Was there ever a formal rebuttal done to Douglass et al 2007?"
No "formal" rebuttal as far as I know, but you probably know about the informal one at RealClimate.
There was no outright rebuttal of Svensmark et al. 2007 either, but Lockwood and Fröhlich 2007 -- which shows that the sun wasn't the cause of recent warming -- was published at around the same time. (Svensmark and Friis-Christensen have published their reply to that -- though it's not "formal" in the sense of being submitted via the peer-review process.)
http://tinyurl.com/2aobxs
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Speaking of which
Speaking of which,
Was there ever a formal rebuttal done to Douglass et al 2007?
(Or Spencer 2007, Svensmark 2007, for that matter)