There are no official releases of Corn yet. The code is available at github.
You'll need gcc, GNU autotools, cvs, and the following libraries (including development headers):
On Ubuntu/Debian this should work out to:
apt-get install build-essential cvs libxine-dev libglib2.0-dev libgio0 libdbus-glib-1-dev libunique-dev libsqlite3-dev
To build:
git clone git://github.com/mackstann/corn.git
cd corn
./autogen.sh
./configure
make
To run it from the build directory:
./corn/corn
Or to install to your system:
make install