Just posting some progress pictures of my 5x8 screen that I'm working on.
Here's the hanging frame; it's built using standard kiln dried 2x4 pine. It's a bit heavy at 35lbs, but very stiff, straight (picked the straightest 2x4's I could find), and pretty inexpensive at $15. I also ran a steel cable with a tensioner so I could raise and lower the frame plus/minus 3 inches as needed.
Here's the canvas; it's been bleached white. It's standard 5x9 drop cloth fabric that I picked up at Lowes for around $10. Just as a note, I'm not really happy with the fabric, it's a bit too rough for my liking.
Tonight I'll be painting it with a satin white, we'll see how that goes :-D .