I just wanted to say thanks for the great idea.
I built a 12.5m (41ft) VGA cable using the instructions on the first page. I used cat5 STP and metal dsub hoods as suggested. I also terminated the STP shield wire to pin 10 on both ends.
I have tested the cable on two projectors and a 42" LCD TV, I used a PC (1280x1024x60Hertz), DVD player and XBOX to drive the image and the quality was exceptional. There is no noticeable ghosting, ringing or banding what-so-ever. I blind tested this cable for a couple of video-phile friends and they immediately demanded that I build replicas for them.
The total cost of building the cable (15m STP patch cable, 2 dsub connectors, 2 shielded metal dsub hoods, 10mm heatshrink wrap) was less that £10! (that's about $17.55 for you foreigners
A few tips for other Brit's planning to build these:
1. Buy STP patch cables, it's actually cheaper than buying a reel of STP! I got 15m cables from expansys for £2 + shipping.
2. Twist and tin the wires before soldering.
3. Use a pair helping hands to hold the dsub connectors while soldering.
4. Buy metallised hoods, the ones from Maplin are of a very high quality.
5. Use 10mm shrink-wrap to strengthen the last 2-3 inches of cable as it enters the hoods, this really makes a difference.
6. Use a continuity tester to check each pin before using the cable. The metal hoods should act as a shied so check that too.