shirley a comparison with the 20D would be more appropriate as thats the model it upgrades upon?
true to a certain extent but the 30d has spot metering and a much bigger LCD. i've also heard the 10d has more noise than its tw successors but the quality/clarity of detail is higher... a pay-off.
to be honest my two main reasons for buiying one would be exposure check on spot and auto-white balance for jobs. other than that i need to be assured the performance, build quality and feel would approach the 1v even though they're wouldn't match it.
i'm unlikely to get one yet but i do go through these phases.