been some mentions of wrist straps on the Sigma group at dpreview. There would be 2 great functions for a camera strap. One is to keep the camera positioned to always be ready to shoot. However your arm was moved the camera would always be facing the proper direction and the shutter release button would be near a finger. I don't have any idea what this would look like but I often find myself wrapping the camera neck strap around my hand trying to figure it out.
The second (or perhaps first) great function would be to prevent the camera from hitting the floor. I have found that if something hits the back of my hand, or I bump it while walking perhaps, my fingers just spring open...seems to have become an auto response. I have a wrist strap for my DSLR which was made by OPTECH/USA and it has saved my Nikon more than once in crowds. Looks kinda geeky but Oh Well.
When I bought a DP1 I went to the local camera store browsing straps and found another strap also made by OPTECH/USA. Like the SLR strap it has kept the DP1 from meeting the pavement more than once.
The attachment string is much too thick for the DP1 lugs but fortunately the DP1 neck strap comes apart in sections. I attached the clip to the DP1 neck strap and the wrist strap to the clip. Works pretty well.
And...at about $10.00 if I do find the perfect strap at least I won't feel like I've thrown my money away.