I wanted to connect my MacBook Pro to the 13w3 input on a Sun 24" monitor. Using the Mini DisplayPort Thunderbolt to VGA Adapter from monoprice , this adapter and a standard Male to Male VGA cable it worked.
I had tried to use the HD15 Male to 13W3 Male(Sun) Cable - 6FT but that did not work. Monoprice customer service was very helpful, send me a replacement but no luck. I suspect that the Sun monitor has a different pinout.
The good news is the Sun 13W3-M to HD15-F (VGA) Video Port Adapter worked.
This is working for me on a Sun Blade 1000. It protrudes out from the back of a box especially with the monitor cable attached. I did have to actually screw it in (rather than simply plug it in) to obtain a good reliable connection. Now I can use a modern lcd monitor instead of that giant heavy crt.