  We explore the influence of open-charm channels on charmonium properties, and
profile the 1:3D2, 1:3D3 and 2:1P1 charmonium candidates for X(3872). The
favored candidates, the 1:3D2 and 1:3D3 levels, both have prominent radiative
decays. The 1:3D2 might be visible in the $D^{0}\bar{D}^{*0}$ channel, while
the dominant decay of the 1:3D3 state should be into $D\bar{D}$. We propose
that additional discrete charmonium levels can be discovered as narrow
resonances of charmed and anticharmed mesons.
