The Collaborative International Dictionary of English v.0.48:

Excellently \Ex"cel*lent*ly\, adv.
   1. In an excellent manner; well in a high degree.
      [1913 Webster]

   2. In a high or superior degree; -- in this literal use, not
      implying worthiness. [Obs.]
      [1913 Webster]

            When the whole heart is excellently sorry. --J.
                                                  Fletcher.
      [1913 Webster]

WordNet (r) 3.0 (2006):

excellently
    adv 1: extremely well; "he did splendidly in the exam"; "we got
           along famously" [syn: excellently, magnificently,
           splendidly, famously]