I second the Sweet Maria's article.
The number one misconception about the press pot is that you want a coarse (or at least coarser than drip) grind.
This is most emphatically not the case!
The finest even grind you can produce, brewed for a shorter period of time, produces much better coffee than a coarser grind, which necessitates a longer brewing time.
Repeat after me: "Press grind is finer than drip, not coarser."
The number one misconception about the press pot is that you want a coarse (or at least coarser than drip) grind.
This is most emphatically not the case!
The finest even grind you can produce, brewed for a shorter period of time, produces much better coffee than a coarser grind, which necessitates a longer brewing time.
Repeat after me: "Press grind is finer than drip, not coarser."