A friend of mine recently reviewed two drama CD's by Momo & Grapes / Kikka, and I thought it might be interesting to post a link to them.
Swiss Dokei no Nazo
46 Banme no Misshitsu
Keep in mind that these are reviews done by a fan of detective fiction, as opposed to my drama CD addicted self. So these are reviews done from an entirely different angle. But personally I liked reading them, so I thought I would share (^-^)