  We give a sufficient condition for the existence of the harmonic measure from
infinity of transient random walks on weighted graphs. In particular, this
condition is verified by the random conductance model on $\Z^d$, $d\geq 3$,
when the conductances are i.i.d. and the bonds with positive conductance
percolate. The harmonic measure from infinity also exists for random walks on
supercritical clusters of $\Z^2$. This is proved using results of Barlow
(2004).
