My wife and kids were watching, as were my mum and dad. They all thought it was great, but here's some improvement suggestions from them:
1. If possible, patch the sound from the PA system through to the live feed. Sound appeared to be coming through the camera microphone and so occasionally the dulcet tones of the commentator

would be drowned out by an inadvertent comment from the camera man (I don't think there were any Shane Warnesque moments).
2. Would be good to post a program for the night on the site with a link describing each race. Mum and dad don't no anything about track racing and they were struggling to work out how some of the races work.
3. There were occasional picture freezes, with the audio continuing to stream through.
4. Commentary could maybe consider that the riders are a little bit hard to make out via the live feed and maybe try to make it easier for the viewers by a) introducing all riders at the start of the race (I know you usually do this Paul so don't shoot the messenger) and b) occasionally refer to the riders by the colours they're wearing as well as by name.
Cheers,
Cashy