Ok. I was able to get hydra to compile with SSH support, but take caution: I am NOT a developer and have not tested if this has broken anything else with BackTrack. Maybe somebody more familiar can chime in and tell me if my steps interfere with any other programs.
Saying that, here's what I did to get it to work:
apt-get purge hydra
apt-get install cmake libssl-dev
cd /usr/local/src
wget http://www.libssh.org/files/0.4/libssh-0.4.8.tar.gz
tar zxf libssh-0.4.8.tar.gz
cd libssh-0.4.8
mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug -DWITH_SSH1=ON ..
make
make install
cd /usr/local/src
wget http://freeworld.thc.org/releases/hydra-6.3-src.tar.gz
tar zxf hydra-6.3-src.tar.gz
cd hydra-6.3-src
./configure
make
make install
Now typing "hydra" I am able to see "ssh" as an available option for the service portion of the syntax.
This was my first time doing anything like this, so I feel really good I was able to get it to work

If anybody tries this, please let me know if it worked for you and/or if it's messed with any other program.