From The Collaborative International Dictionary of English v.0.48:
Ado \A*do"\ ([.a]*d[=oo]"), (1) v. inf., (2) n. [OE. at do, northern form for to do. Cf. Affair.] 1. To do; in doing; as, there is nothing ado. "What is here ado?" --J. Newton. [1913 Webster]
2. Doing; trouble; difficulty; troublesome business; fuss; bustle; as, to make a great ado about trifles. [1913 Webster]
With much ado, he partly kept awake. --Dryden. [1913 Webster]
Let's follow to see the end of this ado. --Shak. [1913 Webster]