"x"th Lightroom. A vital tool when processing many images.
As for the camera, can I ask why you wouldn't just use the KM? Its the right tool for the job? How about a second hand DSLR body with a cheap fast 50mm prime for low light stuff? Say a Nikon D70 and 50mm f1.8?
Off camera flash, I dont mind it being obvious, and used well it can really make an image. I use it a lot, from my wedding work to DH race coverage. I dont think head on in a race situation is the right time for that though. Naturally, each to their own. I love natural light, evocative and serene images as much as I like flat out, ragging the tits off a bike shots. I just happen to be better at the latter! More to the point, in the pretty thick forests where we ride, natural light isn't around too much.
Simon, fair play for taking a D300 riding with you. I only stick to very gentle stuff when I have my gear with me.
Some nice work there guys.