  For the $q$-deformed canonical commutation relations $a(f)a^\dagger(g) =
(1-q)\,\langle f,g\rangle{\bf1}+q\,a^\dagger(g)a(f)$ for $f,g$ in some Hilbert
space ${\cal H}$ we consider representations generated from a vector $\Omega$
satisfying $a(f)\Omega=\langle f,\phi\rangle\Omega$, where $\phi\in{\cal H}$.
We show that such a representation exists if and only if $\Vert\phi\Vert\leq1$.
Moreover, for $\Vert\phi\Vert<1$ these representations are unitarily equivalent
to the Fock representation (obtained for $\phi=0$). On the other hand
representations obtained for different unit vectors $\phi$ are disjoint. We
show that the universal C*-algebra for the relations has a largest proper,
closed, two-sided ideal. The quotient by this ideal is a natural $q$-analogue
of the Cuntz algebra (obtained for $q=0$). We discuss the Conjecture that, for
$d<\infty$, this analogue should, in fact, be equal to the Cuntz algebra
itself. In the limiting cases $q=\pm1$ we determine all irreducible
representations of the relations, and characterize those which can be obtained
via coherent states.
