First, thanks Monkey_Man
I have a cathedral-style ceiling, so I couldn't use a floor flange to attach to the ceiling. Rather than trying to come up with an angled-flange solution (if even possible), I opted to mount it to the back wall.
I'm starting to think I may have mounted it too close to the back wall, so I may come up with an exhaust deflector of some sort.
I'm planning on running all the cables (power, S-video, component) into the wall directly behind the projector and down the inside of the wall to emerge near the floor, hopefully using some sort of grommet and wall-plate combination to make it look nice.
I used an eyehook in the wall (actually in a stud) along with a turnbuckle attached to picture wire to support the far end of the mount.Wall mount picture
Thanks again for the design Monkey_Man,